Originally Posted By DusterKid
I've never personally done the 727 to 904 swap, but know of few guys that have and they seem to pick up about 2 tenths. You picked up a few numbers in 60, but I'm suspecting your convertor for the 904 may be a tad on the looser side and is slipping more than before. What was your rpm at the strip before vs now?

This convertor slippage calculator seems to be pretty accurate:

http://www.tciauto.com/tc/racing-calculators/


Picked up 6-8 numbers in the 60 foot. Thats a bunch

69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, low 10.30’s 1/4
1.41 best 60 foot
6.56 at 104.17