This is why I asked the questions.

It sound like most of the owner's criteria are met. And his gauge for more power will simply be his butt-meter. He has a low maintenance fun to drive car now. You might not want to mess with that. Answer this, was he happy with the power/performance before the dyno run?

A little more power would be had with the first two cams that Dwayne has for sale above. The third cam will make even more power.

One of the problems with the hydraulic roller in an exhaust manifold car is that the ramps are pretty lazy from the seat to 0.050". So seat timing is relatively large relative to the 0.050" numbers. The manifold car will respond very favorably to less advertised duration with more 0.050" duration.