Pray

iTrader: (7)

I am putting a 418 in a buddy's 2001 Vette. His stock short only has 40,000 on it and I made 451/420rw as it sits. The current combo is a TSP 228 cam on a 112 and Old TSP 5.3l heads and all the bolt ons. I am thinking about putting his short in my truck with some AFR 205's I have. The truck makes 260/275rw right now. It would be nice to have the extra hundred rwhp and tq.

Are there any issues I would need to address while doing this swap? Is it a direct plug and play?

How does the stock truck manifold stack up against a ported 90/90 that was on there? I know FAST makes a truck manifold now and I don't have headers but I am looking to do this on the cheap.

Will the fuel pump keep up?
Will I have to upgrade the injectors?

Pontiac Derek

iTrader: (6)

If your truck is a flex fuel truck then both the fuel pump and injectors will work, if not you might upgrade to a walbro 255lp and for intake the truck intake will hold you back but unless you have some serious coin saved up then I would suggest using a tbss 90mm truck intake/fuel injectors and tb but you will need a wire harness so your pcm can talk to the tbss tb,
you should be able to get the tbss setup and harness "x-link" for around 450$ or cheaper, for exhaust use the pacesetter long tube headers and ory and texas speed has great deals on them fwiw

budhayes3

iTrader: (19)

Pretty sure that you'll be fine with the stock fuel pump, but you'll definitely want some bigger injectors with that cam and head combo...some marine 42# 8.1 injectors should work. The truck intake will "work" but will hold that combo back above 5500 rpms I believe. The FAST truck intake is real nice but real expensive, as Derek mentioned, the TBSS intake has shown itself to be a good performer for a lot less than the FAST.

Pray

iTrader: (7)

Cool. Great info guys. I will look into the TBSS stuff. Another guy sent me a link to some SS OBX headers that look like a nice package. They were pretty cheap as well. I was making the power in the Vette on the stock injectors and was just going to use those since I have them. I take it that the TBSS intake is more like an LS1/6 type set up that a truck manifold? I have the hook up at the local dealership so I will give them a call.

Derek. Love the Pontiac stuff. I have a 69 GTO that my mom bought new that I want to rebuild with my girls. Glad to see some one else it doing it. Do you know of any good web sites for the older GTO stuff?

silveradols1

i just took out a 4.8 and put an ls1 in my 02 silverado and everything is plug and play,injectors u have are bigger enough to run them just look foward to getting a tune soon and that will fix everything,and my 4.8 manifold works perfectly fine....