62RPO293,
If the engine likes the .016 / .016 valve setting as the cam card sais for the Howard's cam I would expect the vac to be higher. The .016 setting was too noisy for me and switched around ending up with .012 & .014, shortening up the duration to better match the rear without the engine heating up. I'm pulling 20" at 600 rpm same cam, however I'm pulling 160 psi compression across the board. Compression will effect vac readings. Valve timing is everything, match to your rear.
