I agree with Cliff that a 2802 would be a good choice for a RAIII 400 with at least 9.5 compression. I have a 2801 in a 9.94 to 1 406 (0.030" over 400) and it is pretty tame, idles smoothly and has 15" vacuum at idle (800 rpm in neutral). I went with the 2801 since it has the stock log exhaust manifolds on the small valve #16 heads and needed to move the power curve down to work better with them. It runs great with 93 octane fuel and 36 degrees timing in by 3200 rpm and a great cooling system at 180 degrees max. In a RAIII 400 with bigger valves, more head flow, RA manifolds w/ better exhaust, the 2802 would work much better.
The only engine I have with a 2802 cam is an 8.6 to 1 455HO (stock) that idles smoothly with just a hint of a lope at idle, but also makes 15" vacuum at 800 rpm. It's borderline for going to a bigger cam.
I have a Bullet cam (same specs as the 90619) in a 461 (4.25" crank in a 0.030" over 400) with 9.5 to 1 compression and it is the perfect cam for that engine. It has a distinct lope at idle, makes 14" vacuum at 800 rpm easily and operates the PDB no problem.
Dennis
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