Engine SwapEverything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.
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<--- Has the car, has the engine, knows what he needs..... Lacks the time and more importantly the money for parts to pull it off. I'm selling my 79 firebird formula project and if I get enough for it I'm gonna attempt this.
Just keep us in check, same with Gary. It's awesome that there are people like you guys that are willing to take the time to keep everyone else up to date in detail with whats going on and what's needed. Each swap that people like you guys do, makes it easier to get fellow Firebird drivers to a point where having a third gen Pontiac Firebird powered by Pontiac is very possible. Thanks guys!
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Just a little update it occours to me that the stock second gen manifolds will work on our cars right? Well if thats the case what about 2nd gen shorty headers like these from summit?
These are half the cost of the ram air manifolds, weigh alot less and probably flow about the same too. I doubt they are much bigger than the cast units as they are shorties and I know with the second gen full headers that the big issue is clearing the floorpan with shorties this isn't a issue so long as they dump out at about the same place. When I get to this point I will try to get ahold of a set to try.
__________________ 92 Firebird, 305, TBI, 4L60, Mods: K&N air filter, poly trans mount & endlinks, accel cap, rotar, wires, coil, and boush platimum plugs.
~Show em the bird, light it up and watch em in the rearveiw...
Just a little update it occours to me that the stock second gen manifolds will work on our cars right? Well if thats the case what about 2nd gen shorty headers like these from summit?
These are half the cost of the ram air manifolds, weigh alot less and probably flow about the same too. I doubt they are much bigger than the cast units as they are shorties and I know with the second gen full headers that the big issue is clearing the floorpan with shorties this isn't a issue so long as they dump out at about the same place. When I get to this point I will try to get ahold of a set to try.
So we have the engine mounts available to us through one Company and if I am not mistaken we use the stock trans crossmember to mount the tyranny? Ok that works for me fro there what are you guy's doing for a rear end? What about suspension up front for the weight difference and more importantly out back. How are you going to hook up the new found Torque??What are the options? I know that the stocks are wimpy and I suspect will crap the bed fairly quickly if I'm not mistaken? I could be wrong lol! My kid is interested and I frankly want to do it also.
Thanks Ralph
Those are universal street rod headers not shorty headers, street rod headers just dump center or near center because they are designed to fit things like old school T-buckets and the like, hence why on that page there is no specific cars listed. Shorty headers are basically tube style stock manifolds designed for specific applications and usually dump in the stock locations. The one I listed is specific for a second gen F-body and if you look at its picture should dump in the same location as the ram air manifolds which we know will work.
Oh BTW folks for those of you following my idea of retaining the TBI setup I found out the 454 TBI units off of big block chevy trucks came with a adaptor plate to bolt right up to a quadrajet manifold so these will bolt right up to a stock pontiac V8 manifold with no mods.
Last edited by Formula_Fire; 05-25-2009 at 11:43 PM.
so could i just swap everything from my 76 ventura with a 260 v8 in it over to my 87 firebird with a 2.8 5 speed? my biggest problem is i want to keep it a 5 speed do you think it could handle it or should i just leave the power glide pn the 260 and make it an auto for now?
I have an 87 Firebird with a 2.8. I want to know what will be my biggest headache installing a carburated 350 and I have not decided on a trans.( I have both auto and stick)
The 260 in your Ventura is an Olds V8, not Pontiac, so none of the advice in this thread will help you. You should open a different thread so that we can help you with that.
__________________ "Towering genius disdains a beaten path. It seeks regions hitherto unexplored."
--Abraham Lincoln
hey guys been a long time since i was on here... lost internet for years... gettin ready to put a '66 389 in my 88 GTA and this has been very helpfull... im a welder fabricator by trade and cant see spending that money to buy mounts so tryin to figure out the specs to build my own.. would be willing to make some for others if someone can help with specs.. mainly need the length of the two tabs. im sure ill need more help finding info on this swap.. tired of spinning bearings in 350's and wanted to swap to pontiac for a long time. thanks for all the great info and links... any help or info would be appreciated...
well,. if Pontiac group still doesn't have any in stock in the spring, I'll see about getting measurements from the 69 Custom S, the 78 block when it gets stroked, and see if I can find a low buck CAD program & do up some bracket drawings. take those to a welder & have them fab it up.
__________________ 1977 T/A - sold
1985 Firebird - sold
1994 Camaro - sold
1978 Formula - 400 --> 463 beast winter buildup
1987 T/A - LB9 dd project **new**
