Vacuum question!

Comp cam; 239 and 242 @ .50. The lift is 534/540 with 1.5 rockers.
Huges cam; HTL4652, 246/252 @ .050 w/.555/.572 lift on a 106 w/1.5 rockers

Via duration @ .050 numbers, maybe a 500 rpm increase of RPM. Loose at the bottom, gain at the top.
When ever you increase a cams duration, you loose power at the bottom and gain it on top. Theres also a need for more stall once you start jumping up in duration. Jump 10*'s and theres a new converter in your future. I don't know about this 7* jump though.

Mech. vs. Hyd. differences are basicly, a higher RPM ceiling with Mech.'s cams.

There be a few HP more in the Huges cam. Is it worth the switch? I don't know. I have done them alot just for fun. Just to see. A waste of money for some, fun for me.