What camshaft spec for 425 hp

@Hysteric , It’s been a while since I’ve been in that book. A long way back I followed the MP tips section which never disappointed. Though I could not find the cash for a 6 pack set up back then, the RPM came out and was found very suitable to substitute the 6 pack set up for running the 11’s. In the OP’s case, I’m not to sure his converter is enough for the Hyd. 292/.508 cam to run a low 12 coupled with the 3.91’s in a slightly heavy car. At least as per the speed tips. IIRC, the Hyd 292 is called on. I’d take a guess and say the mechanical 284 would do the trick for the OP. Or your Crower.

When you ran that Crower cam, how heavy was your car?

As noted on the 318 cam, an old member Mike Beck ran a Duster with a 218@050 cam into the low 12’s. I myself started a thread with a split Crane version
(I don’t remember if Mike had the same cam or not but my Crane cam specs were 216/228-.454/.480-112)
just to fool around with and build apon but could not complete the task & goal. The car was sold.

I followed the MP tips on the 12 second section on my 360 w/zero deck KB-107’s, J heads well prepped by a well known shop in the LI,NY area back then, 292/.508, LD-340 w/a big TQ & headers. Behind it was a 4spd manual and 4.10’s. It was really good.