tpi_roc

Ok I started by locating the hole, then predrilled it and increased bits untill I got to half inch, then I went with the 3/4" bit. Word of caution, learn from my mistake, do NOT use a hand drill.

my89gta

sorry

fun Pain

are the lt1 intake bolt pattern the same as the 87-95 sbc pattern or even an older pattern!!!

__________________
[

Ram Air Firebird Formula 350 1987
Now Powder Coated Holley Stealth,
CC306 Cam (236 int./242 exh.),
Ported/gasket matched Factory heads with studs,
1.43 987's,
no a/c, no smog,
3.5"cutout, American Thunder 2 Stainless catback,
Ostrich repinned 165 to 730...code 59,
PLX Wideband,
HX50W Holset, monster SX pump,
42lb injectors, FMIC, FS BOV [[Tuning in progress]] and I still have my Nitrous back up my 10psi...

Click sig pic for a better view of parts and that state she is in right now. www.myspace.com/rippedtornheart
The firebirds own site = www.geocities.com/rippedtornheart

tpi_roc

Slow89Iroc-Z

U plan on mounting any accessories to the front of that motor??? I think you should have tapped them in the rear of the heads....

tpi_roc

No sir

tpi_roc

Distributor hole is drilled in the otherwise stock intake. I hope to have this engine in the car next weekend.

Igor

... this is a WICKED post. Specially for a guy like me that has a complete LT1 topend for parts!!!

Keep us posted, great work man!!!

__________________
1988 Trans Am WS6; th350 10"; 11:1 383 w/Victor Junior heads/intake; Comp Custom baby Solid Roller, Moser 9"....

SOLOMOTORSPORTS

What kind of headers do you run 3rdgen or 4thgen?

__________________

bowtienick

im new to these forums. but here goes . i thought of this same idea when i saw how cheesey the tapping into the manifold looked. i used a set of zz4 heads, and mapped it out where i could go through the stock acc bracket and the head. if i can figure out how to post pics i will.

tpi_roc

you want thirdgen headers

Its getting installed tomorrow, so here's the last pic before it goes in.

DuronClocker

Looks nice, I want to hear how it turns out. Where did you get to weld up the heads? Like what kind of shop? All the welding places around here tell me they don't want to deal with it for liability even though I say I understand the risks.

Those look like SLP 1 3/4" as well, right?

Where did you get those 90* bends from? Those are nice looking.

tpi_roc

Yes they're SLPs, earls russel and nonammers all make 90° AN fittings. Try summit/jegs/whoever. Also another source for cheaper brass fittings is hydraulic supply shops and hose builders.

Street Lethal

TPI-ROC, you've got suuuuum patience. It came out awesome, and I can't wait til you dyno that thing. Excellent!

tpi_roc

The engine is in but hasn't ran yet. Doing finishing touches this week.

tpi_roc

The engine ran today for the first time. They deffinatly work and boy does it sound good. I still have to tie up some loose ends and road test it but things are looking good.

CC89Formula

Are the valve covers the same for an LT1 as an L98? someone said they may be different so it got me thinking.

tpi_roc

Yes they're the same

85 roc it

Do you have any pics of your accessory set up. I'm doing the same thing, but the shop drilled the whole it the front of both insted of the front of the pass and back of the driver.

tpi_roc

Yea I'll take some of the pulleys and with it installed in a few days. I'm only running water/alt/PS though.

85 roc it

Same here, I did find a midmount alternator bracket, probably going to run it, It was the only one that didn't mount infront of the head.

tpi_roc

my stock 85 alt bracket worked just fine.

85 roc it

Good, same thing that I have, so sounds good

DuronClocker

Finally getting mine done. Found a place around here that will weld, mill, and drill/tap the coolant holes where yours are for a good price. Sending off my intake to Millican tomorrow for the distributor mods.

tpi_roc

I dont see how this is relevant?

nwcc

tpi_roc... I wanted to thank you for leading the way on this conversion. I'm sure that I am not the only person thats been motivated to take on this project after reading this tread. Again, I just wanted to thank the people who run and support this great site and I wanted to thank tpi_roc for his documentation of this conversion.

tpi_roc

I appreciate that. I also echo the comment about the greater people of thirdgen.org.

bowtienick

i have a 91 with serpentine set up. i bored through the acc bracket on the driver side. on pass side i notched it and went behind (not running a/c).

ajclark7

I see you got your engine in and running. How is the engine cooling? I have mine ready to install, I'm just waiting on my tranny to arrive. Good luck, your engine looks great.

tpi_roc

Thanks for the compliments, I haven't been able to really test the coolant system yet but I should be by the weekend. I managed to blow the nose cone off my starter somehow so that slowed me down a little.

85 roc it

Did you have trouble tapping the heads, my treads didn't turn out that well, the guys at Napa said that the Aluminum used was cheap

tpi_roc

It tapped very well, however like I mentioned before, drill with a press, not a hand drill.

ajclark7

what type of rocker arms did you use? I was going to order some comp pro magnum 7/16 rockers for mine, I'm not sure if they will work.

85 roc it

I would use 3/8, the 7/16 may be to big for the bolts that hold down the valve cover, at least that was what I was told

tpi_roc

Coolant is 100% completely done, holds water, purges air, and looks nice! I'm going to clean up the engine bay and take some pictures, and road test this weekend.