318 replacement cams....

I have a related cam question.

Since my stage two engine rebuild is on hold due to funds, and I still suffer with poor low end from too much cam in my stock bottom end 72 318 (360 heads, comp XE268H cam, DP Al Intake, 600 Eddy, Dakota exh manifolds, 904 auto & TC, back to 3.23 gears).....I am now down to just fixing the cam for now. So here are my choices:

Option I: Cheap summit cam like the 6900
Option II: Not so cheap Whiplash Hughes cam

Looking at the overlap with my current cam, I am at about 50 deg. That siginificantly hurts my effective CR, right?

With the Whiplash cam, I am at nearly zero overlap, with huge rapid lift (.485/.518 for a stock setup. I am above stock of course, so I am seeking advice then. What should I expect with either cam?

Thanks all.
Man I love this site, but wish I found it a long time ago :(