STROKERYOTA said:
well what about the 5.8 then?
Are you going to use factory efi? Cut down your own harness? Buy one? Or full aftermarket efi?
The mustang maf efi has the most aftermarket support.
You'd have to use mustang style efi to be able to run big cams and tune the engine.
LS are popular for a reason. They are easy and you can buy virtually anything you need for them.
Ford harnesses are pretty easy to cut down yourself if that's the route you want to go.
I am using a stock 5.8 in the buggy I am building. I already had a built FMVB C6, and I wanted to run a Ford NP205.
The stock '89 5.8 is rated at 210hp @ 3800rpm and 315 ft/lb @ 2800rpm
a 2003 5.3 chevy is rated at 285hp @ 5200rpm and 325 ft/lb @ 4000rpm
as you can see, the Gen 3 Chevy motors are rev happy (safely spin 6500-7000 rpm), that is where they get their power. The stock truck heads are good enough that a simple cam swap and tune can net 50-80 hp on an otherwise stock motor.
I am using a cut down stock 1989 harness with stock speed density efi (reliable and simple, but not that good).
When I get ready for more power, I'll have to basically do a full build on the engine, Definitely need new heads to make any power. And I'll have to convert to a different style of fuel injection, either aftermarket or Mustand MAF w/ an A9L computer.
Only reason I'm using the 351W is that I already had it, and already cut down the harness.
http://oldfuelinjection.com/
&
http://www.rjminjectiontech.com/collections/efi-harness
^RJM has a lot of info on ford EFI.
Oh,
Another thing to consider is the LS style motors all have aluminum heads (except a few early truck motors). So consider that money in the bank when it comes to building an engine...