fuel injected 350 in a square?

It's true, the TBI 454 is a slug. It's got a lot of torque, just low on the HP...lots of improvements can be done but stock it's nothing to get excited about. The Vortec 454 is a whole 'nother animal.

Richard

i was very close to buyin an 05 wrecked chevy to steal the 5.3 out of but i missed it. my moms suburban 4x4 has it and they are very strong motors too. i wouldnt mind an 8.1 vortec also. alot of motorhomes got em and they are stout also

Edelbrock has a multiport EFI conversion for TBI motors, supposed to be The Shit but it's over a grand all-in.

Dunno. My truck (TBI 454) only has about 110K on it now. Most likely when it starts getting tired I'll be looking for a swap, probably a 7.4L Vortec but not ruling out a later model LS motor. I've done a couple drive-by-wire VW swaps so that part doesn't scare me.

The swaps are straight forward and easy if you get a wiring harness like the painless kits. What sucks is the cost to do eerything.

I am in the middle of doing a motor tran. swap on my truck. doing a 6.2 LS motor and 6L90 trans.
should be finished in march. not really rushing it. but had to have a custom wiring harness made and
ECM reprogramed.

Y'all just be sure on those LS-based swaps you're using a factory PCM/harness or a very good replacement. I visited a buddy doing a 5.3 into a squarebody, the PCM is marked Delphi but looks like a boat PCM or something...and the harness it came with is batch fire on the injectors. The PCM and harness were $1300!! Fuck that, if I'm going to lay out money like that, why would I tolerate it turning an SFI engine into batch fire mode? He wouldn't have even twigged to it except the injector connectors weren't marked, all the same color code, so he called them to ask which one was which. When they said, "It doesn't matter" he instantly understood...rooked!

Richard

Wow. What system is he using?

I haven't seen a wiring schematic or current track for the LS or Vortech systems but I can't see it being much more difficult than some of the stuff I've done with VW's. Can the GM immobilizer (VSS?) and smog equipment (AIR injection, EVAP, rear 02 sensor) be defeated at the ECU, or do you have to use resistors and 02 sims to fool the system?

You can kill the Passlock system in the PCM with a reprogram, I'm not familiar enough with the LS engines to say if they've got a smog pump - do they?? Pretty sure no. Rear O2's could probably be programmed out too.

When he told me that lame shit about that PCM/harness I instantly wanted to know what company it was, so he hunted all around the shop for the box, and the name on the shipping label was one I'd never heard of, and forgot pretty quickly. Yeah I'm a lot of help huh?

Richard

ive done the tpi abd 700r swap in my isuzu bofore. was a decent easy swap with the painless harness. i also wouldnt mind a 6 liter. they have pretty gud pick up for a small block