woofy

i duno what the hell that guy was saying about the thread not having info on the swap? i only have one thing to say to him INCREASE YOUR MEDS! instead ranting and raving take a hour or two and read! i'd like to thank of you guys for your headaches you had and the hours and hours you have spent gving me this insightful information. my only 2 questions that remain in my head are. stock ram air 3's seem to be the ticket for exhaust manifolds, does the rest of the exhaust system have to be fabricated? and do the engine mounts still exsist? this is dated october 18th 2008...woofy

woofy

p.s. you can contact me @ www.woofydawgie@aol.com ..patrick

Gary Berg

hi im doing an 455 engine rebuild for my grad project and i was wondering if i could put the 455 in an 80's trans am or iroc? also how much would that kind of project cost?

woofy

hi gary
the project your taking on isnt all that hard to do. the 80 transam is your best bet, if it had a 301 pontiac v-8. the pontiac engine family is simular in mounts from 326 to 455. the 301 i think is different. the bad news is the 1980 trans-ams enigine were reduced in size from the 400 used in 1979's to the 301. the good news is the 400 mount (both lower and upper mounts) mount in the same position and absolutely fit with very little difficulty at all in the 80 and 81. the 455 is the same as the 400 block, just make sure the block if its a 400 is post 1970 , or you will need special adapters to fit a "68 400-428 block to a 1980 frame" they do make these!classic industries has them.your iroc is the same as a transam in the 1982-92 era. they have a chevy powerplant and mounts. i have a 1984 trans-am that i'd be willing to switch from a chevy to a pontiac engine. the trick is besides fitment and clearance issues , is the fact they had trick mounts to mount the 326-455 pontiac motor from the mid 90's to around 2005. they may not make them any more.with this said it is a far greater task at hand to do the swap. we will see if i can locate any of the mounts or have one fabricated..patrick

woofy

the cost is related to the 455 rebuild ,which only you would know where your going there.if the exhaust system is in tact you could reuse it, the only other cost i see is the mounts for 326-455 (79T/A 400 motor mounts fit) pontiac engine and they sell for around $40-60.00..patrick

woofy

oh and oh course a BOP transmission, if it didnt have a 301 v-8 in it from the factory....i hope this helps..patrick

woofy

gary i also found out this about 1982-92 firebirds and camaros. you can use the following mounts on them to mount a 326-455 pontiac.:
We do not know of a kit. Most people get frame mounts and engine mounts for a 76-79 Firebird and adapter them to the 1982 and later chassis.

woofy

if you have any other questions contact me @ www.woofydawgie@aol.com. patrick

Gary Berg

okay cool thanks so much i was askin about putting the 455 in an 80's iroc or trans am cause i saw that alot of ppl were using them but i have a 91 transam with a 305 tpi. i was thinkin about puttin it in the 91 trans am but ppl were telling me it would be expensive because of emissions and i would have to burn a chip and all that fun stuff. so.. here are my options i wanted to do, option 1: rebuild the 455 and sell it, and then buy a 350 with a tpi set up not rebuilt and cam it, and put it in the 91 trans am i have. option2: rebuild the 455 and put it in an older iroc or trans am that i woul buy. or Option3: Put the 455 in the 91 trans am i have now. what would be the least expensive?

woofy

option 2 by far and wide.
----------
take the 455 rebuild it . a t/a get a BOP tranny if it doesnt have one, switch mounts. the z-28 you would need to change or fabricate every mount under the car. the t/a is cheapest
----------
the 91 would be fun........LOL

Gary Berg

ok cool ya im ordering the parts for the rebuild kit next week and i just wanted some input from other ppl. i also already have the trans. for the 455 its the turbo 400 i pulled it out of a 74 trans am, would that fit? I bought the car thinking it was the SD455 thats what it said on the hood, so i towed it home and i had the pontiac dealer check the num and it wasent the SD o well. The car was crap to! The owner before the guy i bought it off of used putty and aluminum foil on the body to patch the body! lol, who new it fooled me untill i started tearing it appart, anyway i got the guy to sell it to me for $500 and im parting it out on e-bay and so far ive got my money back and ive only sold like half of the parts. ill keep u updated on the rebuild and if i have any questions when i install ill post them up. thanks again

dwillis

when you get it be sure to post plenty of pics...and any parts yo wanna sell off that tpi let me know pm me and we can talk off the thread.....try to put it in and have the hood shut.....

woofy

yes it will fit. and a good choice
----------
contact me through :woofydawgie@aol.com

Gary Berg

i havent decided on what to wit my 91 t/a yet ill keep u posted. how much does the tpi set up on average sell for?

woofy

i dont know but to give you a idea go to carpart.com, thats a 90 million part used part place where junk yards post parts

woofy

they go for in top shape 125.00

woofy

thats www. car-part.com for the junkyard parts listing

howesbird

Hey im been reading this post for a while and collecting parts and doing tons of research on this swap i work at a parts store so i found alot of my info through just grabbing some of the parts right off the self and check it out myself as for:

The manifolds i got ones off a 70 grand prix same locations im having a local exhaust shop make me a y-pipe

The mount is the only thing i really havent figured out exactly due to the fact i havent got it in there yet

The tranny im running a 2004-r out of a grand national for the overdrive. I have read tons of article saying that you cant get a 700r-4 for BOP, but you can if you want to keep that style in you can grab a 700r-4 out of a late 80's caddilac that had a 307 so you wont even have to worry about the torque arm mount or crossmember.

But thats all the info i can think of if i could help at all that would be cool. I know tons about pontiacs so ill try to help anybody

Gary Berg

would i need different monts for the th400 trannny and how much if needed would they cost?

five7kid

Check Board sponsor Spohn for a transmission swap crossmember. A torque arm that mounts to the crossmember would be a good idea at the same time.

Gary Berg

Where can i find custom engine mounts for the 455 i want to put in the third gen t/a?

woofy

heres the scoop from the Holy grail of Pontiac. Mr. butler of jim butler performance adressed this issue for me. there are a set of mounts that belong to the 1976-79 era pontiacs' that will do the job just fine. the trick is to get your front to back and side to side location of the engine in the bay just right. and tack the mounts to the frame.When you set the engine in the car get your front to back and side to side location to clear the exhaust and it will make it easier. We have used the 1967 Ram air exhaust, 3 tube headers and custom shorty headers, You also can modify a set of headers made for another application. The wiring harness will just flip to the other side of the engine,the oil pressure sending unit wire will need to be spliced if you need it.There are trans crossmembers sold by aftermarket suppliers.Dale at, Competitive Edge, in IL. has done some of this,618-687-2392

howesbird

The th400 going into that car is easy as pie b&m makes a kits along with tci makes one all it does is provide you with a either a new crossmember or a shim to move the mount location back thats easy enough then the torque arm issue is addressed by a bracket in the kit the mounts to the tailshaft housing and the torque arm mounts there.

And even go this root if your made of money and you like spohn stuff
http://cgi.ebay.com/ebaymotors/Parts...=p4506.c0.m245
This is something you just specify what tranny your putting in and the crossmember will differ

Saevelland

This thread needs more picture reference. Some one out there has to have some?

woofy

what pictures do you need>? its self explainatory. read the thread

howesbird

its not that we need pics that much. we need exact info from some one that has done it:

What mounts? we all know if you can get the IA mounts that would be great but has anyone used the second gen ones

What headers/exhaust manifolds? we know that the ram air ones will do but their expensive and so are the IA swap headers which you need the tubular member for anyway. Im using the grand prix ones cause they look just like the ram air ones

point is we just need to have someone that has done it a billion times to give us advice which is not very likely

woofy

bottom line is this , what your doing isnt exactly cost effective. if your worried about money then i'd suggest a 383 stroker motor is the ticket. everything you are doing is fabrication when installing a 455 into a 3rd generation. yes second generation mounts work. more specifically 1976-79 mounts. when aligning clearance issues with the headers and side to side , front to back locations are met to exact tollerances and the location has been found to satisfy all of the above.you have 3 choices for exhaust manifolds,make your own, fabricate a existing set or use stock manifolds

woofy

i would suggest reading threads its helpful, butler performance addressed the issue for me and i posted the info on the thread.
----------
here it is again-->heres the scoop from the Holy grail of Pontiac. Mr. butler of jim butler performance adressed this issue for me. there are a set of mounts that belong to the 1976-79 era pontiacs' that will do the job just fine. the trick is to get your front to back and side to side location of the engine in the bay just right. and tack the mounts to the frame.When you set the engine in the car get your front to back and side to side location to clear the exhaust and it will make it easier. We have used the 1967 Ram air exhaust, 3 tube headers and custom shorty headers, You also can modify a set of headers made for another application. The wiring harness will just flip to the other side of the engine,the oil pressure sending unit wire will need to be spliced if you need it.There are trans crossmembers sold by aftermarket suppliers.Dale at, Competitive Edge, in IL. has done some of this,618-687-2392

Gary Berg

Gary Berg

Here is the 455 in progress ill have more pics soon!
100_3676.JPG

100_3671.JPG

100_3674.JPG

woofy