Mastrocola17 i have some "tiny" comp 262ah's if .550 lift is "tiny". they sound nice but have some drivability issues. i made 262rwhp with cams, lt headers, o/r x pipe, cai, 70 tb, plenum, ud pullies. and diablo tuner through automatic.
when i put it in drive or reverse it stalls unless i give it min. throttle. and sometimes the ECU has a nervous breakdown and the idle will hang, surger or just idle extremely rough. then sometimes it sounds like there are stock cams in it. it could also be the stok MAF sensor too. i'm not sure.
You need a high stall TC with cams to make it work how it should, also program the idle higher with the handheld tuner and the surging is an IAC problem or just the studdering idle. Do you have a tuner. or was it tuned - cuz i'd put your numbers a lil higher than they are as well.