Cam dynamics sbc solid roller id help

[c4mo]

I have cd solid roller for a sbc. That has No cam card. I know the cam is from the 70s and was In a ss/ma 327 250 hP. The numbers on the cam are 316 over 316, r over a, and the number 12602. Thanks

[cknight]

This is a single pattern roller camshaft. The duration at .050" is 280 degrees. Lobe lift is .420", resulting in a gross valve lift of .630" with the standard 1.5:1 rocker arm ratio. Recommended valve lash is .030" at operating temperature. Lobe separation is 104 degrees. Cam timing at .050" is: intake opens 38 degrees BTDC, intake closes 62 degrees ABDC, exhaust opens 66 degrees BBDC, exhaust closes 34 degrees ATDC. Regards, Chase

[c4mo]

Thanks!