I will be running a 360 with stock heads kb 107's, rpm airgap intake and 750 demon with headers and electronic ignition, at what point will a oem replacement damper not do the job and the need for a high performance one be needed? this will be a street motor with somewhere around 10 to 1 compression. the machine shop will be balancing this motor but i can't afford the mallory for balancing which they said will be $350.00 more, so they said get the externally balanced flexplate with the cutout in it and a externally balanced damper and they can finish the balancing, is this still considered an internally balanced motor?
