What camshaft spec for 425 hp

Ooooh, bummer....Just FYI, switching to the 727 from a 904 will slow the car down some (1-3 tenths of a second from what I understand). Not saying that you can't go fast with a 727...heck, that is what I use, and my car boogies, but when you start looking for every last bit of ET you can squeeze out of a combo (if you are into that sort of thing) you will be wishing you stayed with the 904.

I deliberately chose a 727 for my small block build as long term, I am going to a B block. I will save money and aggravation by not having to monkey with drive shaft length.