KB184s are what I used in my build. Yes, they took some work to get squish and compression to work, but once it was there, DANG! I did use the small spec Summit cam and 346 heads. The Hughes cam might get a bit more area under the curve.

While it made loads of torque right off idle, its power wasn't too shabby either. A dyno day with some buddies had my towing motor putting down numbers that made some of their performance builds look weak.