Thanks Paul . . .

I am hip to the distintion between .050 duration versus the overall duration off the seat. It helps to describe the cam profile - specifically how agressively or gradually the lobe accelerates the valve up to maximum lift.

I am thinking of approaching Isky to regrind a cam to this spec. Perhaps they still have the specs or can retrieve them from an archive.

My project is a '49 fast back. The plan is to be outward stock but with period correct hop-up parts and mods. Nothing newer than say '53 or '54.

I am interested in this camspec for several reasons. First is that it's a proven design for the 216 that was sold commercially. Second is that I have read that cams for "road jobs" are best to stay conservative on intake duration and go longer on the exhaust duration -- a dual grind -- not unlike stock. Lastly, the advertised lift on this cam is modest - only .375 at the valve - or .25 at the lobe. This is desirable because I plan is to run 1.7:1 ratio rockers on the intake (Barkers) and I don't want to abuse the springs.

Keith

[Linked Image from 49fastback.com]