iv searched threw this thread and found some good info...but was wondering just how hard is it to swap out the stock 305 for a 350? can just a plan old 350 shortblock be used and just transfer most everything over to it?? will a stock computer from a 305 run a 350?

 

Everything is a striaght swap as far as "bolt on" status is concerend. You will need certain things for a 350 swap alone with a new chip. Becarefull what 350 you get. Some don't make much more power than your current 305 if you leave it stock. Keep searching. I assure you those answers are out there. There are even some threads started down the page that cover this.

 

i think what she plans to do is just replace the 305 with a stock type 350..and then start moddifying from there...

 

She will be better off building the 350 before she puts it in. That is a lot of work to go through for only a 20hp gain. I would prep the car now like full exhaust, intake, suspension, chip work and then when you swap motors the car is ready for it.

 

you would probably want to ditch those heads too, didnt all the RS cars come with TBI?

 

Some came with the V6. The TBI was actually an option.

 

are there any heads/cam/intake combos for the TPI 350s that perform really good that are fairly common...

for example...on the 302 mustangs(5.0), a common combo is trick flow heads, stage one trick flow cam..and one of trick flows EFI intakes...its a proven combo that is commonly used

 

Since you are not going with TPI dont worry about what works with it. I suggest the L98 base (heads, block, cam) because it is a good foundation for a TBI build up. You can use any 350 you want for the most part but besides the L98 there aren't any real performers out there in stock form. You will have to put some money into the 350 TBI motors found in caprice cars to make it worth the effort. 99% of all TBI swappers find an old L05 out there and build it up. The 350 TBI swappers that create one out of an L98 long/short block usualy keep the stock heads that come with that motor. The vortec head is about as popular of a head out there for any buildup whether is be TBI, TPI, or carb. Cam selection will come down to what you want to do with the car.

 

I know about the v6 cars, but I didnt know that you could get a later model RS V8 with anything but TBI, never saw one with TPI on it.

 

Yea it was super rare in 92 only. You could order the 305 TPI as an RS option. There are only a handfull out there conpiared to the millions of TBI cars.

 

wow, thats cool. I am just one of the millions other that see RS and think slow tbi car.

 

oh, wait...i thought if the 305 was swaped out for the 350, TPI had to be used? so its possible to swap the 350 in and retain the TBI?? and what i said about proven combos i was talken aftermarket..like edelbrock heads ect...

P.S. dosnt any company make a blower for the third gens...if so..why dont i ever see them on peoples cars??

 

You can swap to a 350 and retian TBI. I didn't realize you were confused on that. You don't have to swap to TPI. Doing so wouldn't be very benificial in the long run anyways.

About the blowers. There are more than you think but they are costly. For the same price as what the blowers cost you can have a wicked 383 combo with an aftermarket TPI induction set-up that will blow a stock supercharged TPI motor out of the water. Most guys go that route.

 

humm i see....the reason i ask about heads is cause the place that would install the motor most likely dont have specific types...just a bunch of rebuilt 350's..so i was thinken she could always just buy aftermarket heads and take them to that shop and say i want a 350 put in with "these" heads

you said the vortec heads were good..i seen them on summitracings site...what ones would she use for her 350? i ask cause you said they perform well and they are a good price

 

also i was going to ask....

so...if i had a 350 shortblock..and put aftermaket heads on it..or GM heads...dose everything from the 305 swap over to the 350 and the 350 goes right in...or is there "special" swap parts needed...like oil pan,intake or tranny change?

im pretty much starting from scratch here cause im a ford guy..i swaped motors in my 5.slow as you guys call them..but im guessing its not the same in the camaros, mine needed different oil pan,lower intake and headers...but the factory computer can still run it..im not even sure how the TBI 305's are ran...computer or...??

 

For the most part it goes like this: If its Small block chevy, its small block chevy. All external components pretty well interchange. There are exceptions, like the old heads without accessory holes, etc. But between 305 350 327 283 400 they all pretty well accept the others components. Just not rotating assemblies, well at some of them can share components of that too, but thats a whole other story. To answer your question, yes all of the externals (accessories, oil pan, water pump, dist., intake manifold, etc) will all bolt up just fine.

 

i ask cause the place that would do it will most likely just take the 305 out and transfer everything to the 350...and hope it starts....figure if everythings swaps over..and we provide them with better heads and possibly a better cam...it should all work out well...sept for my GF's pocket book LOL

 

Yea you will need a few things. Do not let them re-use the heads and cam from the 305. That defeats the purpose of going with the new motor. If you have to, hold out until you can get some better parts.

 

she said she would planing on using her tax money for it so it wouldnt be till probubly next summer....

was there a specific type of GM vortec head that would work better then the others??

shifty..i was checken out your site...very nice car..love the wheels...i got to thinken though..you put lowering springs on your car along with larger wheels...but my GF's car with stock wheels sits around the same height as yours? makes me wonder if some one did something to it..also..any rubbing with those tires/wheels....GF was talken of new wheels or mabe having stock wheels chromed

 

You would want the vortec heads that were found on 350 vortec motors. The 305 vortec heads aren't as good and the big block vortecs heads cannot be used for your application. Try a few searches to see which casting numbers to look out for. Some were slightly better than others.

About the springs. Chances are her car is suffering from saging old springs. It is very common with these cars and some people's cars actually are raised a tad when the install new springs because their old ones were so bad. I do not have any rubbing at all even at full lock.