what max RPM on low comp 273

Hi folks,

maybe a silly question but....

what rpm would you suggest should a nearly stock low comp 273 make at pedal to the metal with a 3,23 and 904 tranny. (only modification on engine is an offy-intake and a 4bbl road demon jr. carb 525cfm and an FBO-ignition)

got mine last weekend on the autobahn and could only make 4000 rpm (at approx. 118 mph) is this okay, or should would a more healthy engine make more rpm ??

while normal faster acceleration the tranny shifts a approx. 4500 rpm what seem okay to me