A little explanation of what I'm doing. I selected this cam as a matched set. Lifters, valve springs, valve seals, and timing set all included. This takes care of most warranty issues as far as compatible parts. I ordered new push rods due to the unavailability of 67 style lifters. The car has no power brakes and is a 4-speed, so vacuum and choppy idle are unimportant. I think this cam may make enough vacuum for power brakes, but I'm not sure it will be suitable for an automatic transmission without changing the torque converter to one with more stall. It's not over 500 lift, so there is no worry about piston/valve clearance. I will be having 1.74 exhaust valves installed over the stock 1.60 and a little pocket porting done and retain the 516 heads. I'm thinking that this should put the HP in the range of a stock 440 and be as reliable as stock. I don't plan on putting it on a dyno to prove anything. It's not a race car, it's just going to be a show/cruiser that will light the tires a little.