Poor brakes at low RPM

[carpoor]

Hrmm... maybe you have a vacuum leak somewhere. Still, that's a big cam for a cruiser. JMHO

My 2000 Z28 that ran high 10's - full weight, drag radials, through mufflers... did so with a 228/236 @ .050" duration cam in a 347" LS1. It had great manners and pulled 17-18 inch/hg of vacuum. (factory cam was 20-21 inch/hg for comparison) It was a Crane cam, I had a Comp Cam in it previously that made less vacuum (12-13 inch/hg), made less power, and had lots of cam surge unless I kept the RPM up. That cam was 238/242 @ .050"

I could go on about cam stuff, but I feel we need to figure out your vacuum problems for now.