what you need is a LS1(possibly LS6), preferralby a 01 or 02 due to small differences but any other year would work fine. get HP tuners to edit the computer or get someone to tune it for you. make sure you do all the test on the engine b4 u buy it if possible, although these engines are really strong. the 4L60E is a good trans for near stock power levels from an LS1, not the most reliable after that. http://ls1tech.com/forums/forumdisplay.php?f=28 that is the conversion section for LS1Tech, they probably can tell you exactly what to look for in a engine.