454 330 HP RH Engine rebuild

I called Howard's Cam and they do not make Camshafts for RH motors but they refereed me to Cam Motion in Louisiana. Talked to CM and they stated that my motor with the 2 piece gear drive the crank turned reverse but camshaft rotated as LH/normal. My distributor gear is a standard rotation gear nor reversed. However firing order being in reverse I will need a custom Grind cam. Also CM stated that with the wet exhaust I would need a Lobe Separation of 114/115 degrees. 

Cam Motions can provide any duration and lift that I would like. However I am not a Cam Shaft engineer but I would like to step up the specs and power band to gain a little more performance over the 330 HP PCM. All I have to go on is the specs from other 454 marine engine camshafts like the 330 HP and the Magnum 454 listed below. Changes to this motor are Large Oval port heads - 781s, Hydraulic Roller Cam, HEI Ignition, 9.2 Compression and Balanced rotating assembly. Mabey 1400 - 5200 RPM performance....Any suggestions on Cam Specs and if this Reverse engine info does not sound correct please let me know as well. 

BTW I am not opposed to a flat tappet camshaft off the shelf if I can find one of the melling replacements cams!  Thanks....Tom

Both those stock marine grinds mentioned above are -4 to -6 degrees overlap at 0.050 , but also means there is still physical overlap at lower lift, not zero.  Eliminating overlap  at 0.000 lift entirely would produce a doggy engine, industrial like.

those overlaps are of course very safe and should encounter no issues up to and around  0 overlap at  .050 

that comp 11-445-8 is -3 overlap at its 112 lsa,   and should be a kick in the pants, but still very 'safe' and depending on ones goals, one could consider more intake duration options.