Failed AFM lifter means;
BTR DOD delete w/ 16 replacement LS7 lifters
224/230 BTR Stage 4 cam
.660 BTR springs, hardened rods
Circle D 3200 budget tq verter
Tune from Cubby's (CarbonGMC) tuner and he'll be doing all the work since I don't have the time or know-how at this time
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My guess is that setup will put down about 300hp to the rear tires, very stock trans friendly, install a corvette servo too if you haven't already. I had a similar cam setup and towing and daily driven abuse trans lasted another 65k before it let loose.