727 or 904?

Love the car.
I'll make a driveshaft and our converter guy has a drive shaft balancer. Good there.
The engine hasn't hit the dyno yet but it's similar engine to the 465 hp and 500 tq. crate motors (with some porting).
I don't know what the cores are but my bro has a wrecker, I have access to most anything.
Looking for info on specific parts that might fail.
Thanks

d55dave said

55 custom royal lancer. Same car as a regent, different trim level.

Many things to consider, for the question of 727 / 904. What driveshaft do you have ( 904 is longer), what is your hp level, what cores do you have, what year are they from, what condition are they in........?

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