How much ET will i pickup with following changes

We run the 904 low 1st gear it will help get it moving the 904 is lighter anyways you will probably pick up some rpm as the drop back on the shifts will not be as far,we went from our 9.5 to our 8 inch with our 360 and it gained apprx 300 rpm through trap so yea .3 in the qtr i can see that,have fun that 1-2 shift will come quick me and my rev limiter will attest to that:usflag: