I've never used the 041 cam, but I have used 2 bigger cams than the 041 in a 455 with less than 9:1 compression. Ran the H-O Racing HC-02 (231/243,.512"/516" w/1.65 rockers) and the HC-03 (244/252, .550"/.554" w/1.65s). Only ran the 02 cam for a short time before switching to the 03 cam, in a standard-bore 455 with #197 HO heads at around 8.6:1. It ran great and had low vacuum at idle as expected, manual brake car so it didn't matter.
Sure, higher compression would have been better, but in my situation I was using the parts I had on hand along with the camshaft recommendations straight out of the H-O Racing catalog. The HC-03 was recommended for the 455 HO (a known low-compression engine, right?) with lower gearing, I was using 3.89 cogs with a 28" tall tire:
http://forums.maxperformanceinc.com/...5&postcount=19[/QUOTE]
b-man, would you run the HC-03 again today
I have an HC-63 cam I am holding on to for my Super Duty, I believe it spec's out the same as the HC-03, I was considering this cam for my Super Duty. Would anyone this cam today. With 1.50 rockers it seems close to the 041. Does anyone know the specs on the original SD cam for 73 that got axed.