Well, I know you said you didn't want to hear it, but I'm never one to keep my mouth shut so here it goes.
For the life of me I can't figure out why anyone would buy a Thumpr cam with it's wicked sounding idle and so-so performance, and then soften it up with a set of crappy Rhodes lifters. The ONLY reason to buy a Thumpr is for the sound because there sure are a lot more cams out there with higher performance for less money. So buying a Thumping idle and then taming it with leaky crap lifters is, at best, asinine. Rhodes lifters will cost you big on top and take away a lot of the choppy idle you just paid big money for.
If you're hell bent on making it work, then limit your mechanical advance to about 10*, use 25 or 26* at idle and have it all in by 2500 rpm. MAYBE, then, you'll get the carb to run.
There, I just said what everyone else was thinking.