I have a 99 suburban that I am ls swapping. The motor is a 6.0 with flat top pistons and gen 4 rods it has 243 heads with Manley valves and pac-1218 springs, Tbss intake, warr drive by cable throttle body, btr stage 2 truck cam and I am running a Holley fpr. The trans is the stock 4x4 4l60e. I am trying to figure out a tune to start with. The motor is modeled after an ls2 but all the ls2?s are drive by cable. I am guessing my next best guess would be to grab a tune from like a 01 firebird and segment swap the trans. But didn?t know if there was something closer I could start with for my motor so I am not having to tune as much since I am brand now to this.
P.s. starting with a 411 pcm and truck harness with computer grounded o2?s not case grounded.
Thank