5.3 GMC

I have a buddy who wants to swap out a 350 for a 5.3. What are you guys using to stay fuel injected? He's thinkin about going carbed if he can't find the stuff to do it. I thought I'd ask y'all and see what options I can run by him to look at.

slammedsilvy

iTrader: (3)

I'm not sure on what all is needed outside of a higher pressure pump. I'm sure some quick searches though would break down exactly what you needed. Keep the injection, you'll thank yourself later.

726.0chevelle

iTrader: (17)

it would be easy if he keeps the stock trans. He would need a wiring harness, fuel pump, motor mounts, tuned computer to get started. If he keeps the stock trans it will save having to swap out the speedometer.

AUTOT3K

iTrader: (3)

there's some kits out there
you can get a fuel injection kit from holley and then you swap in an in-line fuel pump (might even be in the kit)


or for a more factory approach our sponsor LSX4U has complete kits /w ECM and all

5.3 GMC

Thanks guys. I'm still looking. The tranny is a 5 speed and he plans on keeping it. I figured a upgraded fuel pump in. Just tryin to find out what kind of harness he will need.

goinbrokez28

iTrader: (1)

I'll Be doing the same swap on an 85 soon, and I am thinking about using the LS1 MicroSquirt kit from EFI Source. Its basic, but it will work for my project and budget.

LS1 24X modified Microsquirt V3 | EFI SourceEFI Source

denmah, over on tech has a good write up for this as well.

AUTOT3K

iTrader: (3)

your gonna have so much room to play around under that hood haha
I miss that about my 81, i'd sit right in the engine bay when I was doing stuff to it

726.0chevelle

iTrader: (17)

there are plenty of people selling factory harnesses that have been cut down on eBay or on different sites. Also there are many companies that make them from scratch that's what I bought. The harnesses for the motor only are quite a bit cheaper. I'm not sure what's the flywheel and clutch combo to make that trans work.

5.3 GMC

Are u sayin the trans wont work? Im a 4l80 guy so i dont know. I told him to get a t56.

06murder

if im right you can just get a sending unit from a 88-93 silverado there bout 50 bucks