compresion test of 125lb. Cam question

What numbers are best from a compression check? I just checked my 340 and I have 123-126lbs overall. Manifold vac.@ idle is 9+, I use a 3.5 power valve. The cam is D.C. .484Lift, 108 separation, 288Duration. Purple S. I'm thinking this is too much cam, from the cylinder pressure. The .060+ pistons are -.010 down and the 1972 J heads milled/ matched, aprox .050, .020 shim gasket. This was a Chrysler dealer $800 replacement type with heads, we fitted w/2.02 intakes. It ran 12.40 @ the old Fremont strip in a 3300 Ebody Cuda with N50/14" Kellys w/ 4.30 gear @108mph.
Now in the 68, 12.97 @ 104 3.90gear, 275/60-15" in Sonoma. Same old Doug cheepys, 340LD, 780vac. Holley. I added 1.6 steel/bushed roller rockers. for aprox .530 lift. with no improvement in MPH. Now that I have adjustable rockers, IS THERE A BETTER SOLID FLAT TAPPET CAM I CAN USE INSTEAD?