Offenhauser 2@ !bbl Holley swap info

Well, I guess most don't run the dual 1 bbl intake from Offy. I want it just to be different. I'm running a stock exhaust manifold with the Accurate Exhaust 2.250" set up with the higher flow "D" muffle to look factory but better flow. I picked up 450 rpm from the smaller factory exhaust. They do a super job with factory looking exhaust.
My engine is a 66' with the head done for hardened valve seats and viton valve seals. The lower half is all rebuilt to stock. The engine has about 4-5k on it since the rebuild and runs good. This is why I am doing the mods now. /i just want a bit more cam for better breathing.

Side note: really tall lift and high cam lobe separation cause the "air popper" effect. I heard this in a slant in a Barracuda that ran high 10's in the quarter with no nitrous or turbos... back in the day. Boy did that catch your attention.

I'm just not finding alot of cam selections out there and the oil pump drive gear getting worn out kinda does bother me. Easy to change but who wants too.
Joe