TG02Z71

iTrader: (2)

I have two 5.3l engines, one bought from someone here and the one in my truck. One is from a 1999 or a 2000, mine is a 2002.
Going to get the machining underway soon and am wondering which is better for my build into a 5.7l?
Any ideas or suggestions??

Thanks.

mcfarlnd

iTrader: (15)

both are the same. heads might be a different casting but, the 2000 will be good to bolt your 2002 parts to or vice versa

00ChevyScott

iTrader: (10)

the 06 5.3 block I got was exactly the same except for the fuel system. Same heads, same intake (besides DBW), same water pump, everything. The only thing I had to change was the temp sensor on top of the block

GMCtrk

iTrader: (27)

flip a coin

InchUp

iTrader: (2)

If it comes down to it, yes, I'd flip a coin since the differences are subtle that have nothing to do with the machining.

I would keep the running 5.3L in your truck and build the 5.7L on the side to lessen the down time of the truck.

lady3bglover

iTrader: (3)

He's got a point, lessen the amount of down time...

TouchOfEvil04

iTrader: (13)

i thought they upgraded the rods?
or was that just the 6.0l motors?...i forget..

TG02Z71

iTrader: (2)

I thought the early cranks were cast VS forged? These are the deatils I'm looking for.
New rods will be used so thats not a big deal and I also have a set of 317s off an SS truck.

InchUp

iTrader: (2)

That'll work for sure. Mill the 317's down to match the right head gasket and compression ratio you're after. Anywhere in the range of 9.8-10.3:1 you'll still be alright on cheap gas.

TG02Z71

iTrader: (2)

I was thinking close to stock compression ratio would be best since I will stay with a turbo set up for added power.