I have a 2000 chevy silverado 4x4 with a 4" lift, currently a tired 5.3 with bolt on mods. Instead of purchasing a new p.u. i've decided to fix this one up a little. Here's what i have now. I bought a magna charger side mount non intercooled so whatever i use for a motor i am going to use this. My options are a new 5.3 for $2045 and put it in with s.c. and bolt on mods-cold air-bbk throttle body- headers(full length)-diablosport tuner..Next is a engine from a 04 GTO fresh from machine shop that had 10,000 miles with small camshaft(.529 lift and .220 @.050 made 548rwhp-and put thes.c on that-- the last option is I have access to a 2002 6.0 LQ4 motor with low miles. Pull apart and put on Patriot stage 3 with a cam I already purchased from Ed Wright from FTI(.613 -.232-.238@.050 on 114 made for s.c. I want to get rid of cats and egr and air pump also. Any ideas would be helpful.

 

To be honest with you I would forget about the non-intercooled M90 and swap in the LQ4 and start from there.