I also am building a engine for my 1970 Chevy, it is a 2010 l99 engine I got from a 2010 Camaro as,, I had the heads reworked by the folks who make trick flow heads since they are close by, they put in ls3 valves, cc the chambers, installed Texas speed valve springs , put comp cam trunion kit in the racker arms.I have a Texas speed 228-228 cam which is made by comp cam..ihave removed the variable valve phaser and changed the lifters to remove the vvt lifters. I have a engine harness from a 2006 gto but no engine computer, I would like to use the harness but my question is WHAT computer to use???? forget my poor spelling as my fingers don't fit this notebook my son got me... thanks