[Cliff R]

+2

A big block Chevy build can get there with a much smaller cam for sure. Less stroke/piston speed, not nearly the mass of spinning and reciprocating parts, smaller bearing diameter, better bore to stroke ratio, and you can drop a tennis ball thru the intake ports on most of the heads they are using to get the big numbers we see on dyno runs, etc.

As far as the 750cfm carb being used here. About 20 years ago I did a carb CFM test back to back on they dyno an repeated the testing at the track. The carbs tested were 750cfm, 825cfm, and 850cfm. On a 500hp engine the 750cfm carb cost 13hp with no other changes. The 827cfm carb and 849cfm carb were near mirror images of each other on the dyno.

At the track remarkably the entire spead of ET was less than .05 seconds between all the carbs tested. The 825cfm actually ran the highest MPH for all runs made that day by .30 mph. The quickest ET was using the 850cfm carb. I wasn't really all that surprised because on the dyno ALL the carbs were dead nuts even to 4500rpm's and they shift points were 5500rpms. The engine simply spent very little time in the RPM range where the larger carbs were using more power plus at the 500hp mark the engine didn't act like it needed much more than 800cfm.

So there is no doubt you are giving up some power at high RPM with the smaller carburetor but it's not going to be anywhere near 100hp.......IMHO........