Quote:

For overdrive options, I'd use an A-500 instead of a 518 in his case. A properly prepped A-500 will take the power, is lighter, and takes less power to operate. That, or, dare I say it out loud, a GM 200R4.



My buddy runs a 700R4 behind a BB ford and he even
uses the lock up during racing... he gets like 3 more
mph out of it in lock up... he doesnt use the OD when
racing... thats on a heavy pick up(3900 lbs)
The reason I said the 518 is thats a 727 and the 500
is a 904... with what he is running a straight forward
re-build on the 518 would handle his power... the
500 being a 904 is gonna need some fancy stuff to
take any power... but that shouldnt be any issue and
yes its lite... I went with the 518 for the added
clutch area ...my engine is only 550 hp and 520 tq