Is your cam from Hughes? I ran their older 260/264 flat solid, IIRC it was .628/.633 with 1.6 rockers. In my 10.8-1 408 it ran 6.57 in the 1/8 on pump 93 at 3240 pounds. Pretty good cam IMO.
No, Howards. That cam was on the shelf when i needed one and others had nothing remotely close to what i wanted. It would be 603/603 with 1.6 rockers if i had some
Dwayne and i both agreed it was “ one size too big” but would work with correct convertor.
Its proven to make good power for no more than i have going on