thehemi

iTrader: (2)

I found a 2002 4.8 with a 2003 intake (for using ETC).
The owner said that it requires a newer wiring harness
because the injectors have a different connector. Can
anyone confirm? Assuming I don't want ETC, so I swap
out the TB, is it true it will still require a 2003+ harness?
Is it something that's hard to find? Would a pre-2003
intake and pre-2003 harness be more available/cheaper?

Do the 4.8 and 5.3 share a common intake manifold?

thehemi

iTrader: (2)

Or just swap out the fuel injectors?

50chevy

iTrader: (2)

4.8, 5.3, and 6.0's all use the same basic intake manifold, they all bolt on the same except the 2001 and older ones have an egr and the 2002-on do not, I think that was the year it changed but all year intakes fit. If I was in your position, I would take the 2002 4.8 and put whatever truck intake fit it (2002 or 2003 etc. because the port designs are all the same) and get a wiring harness for a non-electronicly controlled throttle body and the injectors that fit that harness correctly and run it that way.
Well, that's my $0.02, hope that hepls.

thehemi

iTrader: (2)

Cool. I'm watching 4.8L sales and they seem almost worthless.
I guess the full-size crowd doesn't want them, but they're more
than enough power for an entry-level V8 for an S10 project.