85 Scarab II Stock 375 hp 454's trs drives 1.5 ratio....Currently running 23p Mirages ....getting 55 mph on stock speedo....@ 4300 rpms.... I put a set of 23p Cleavers on it and got 60 mph and 4600 rpms ....My question is can i get more rpms and how much rpms is to much....

You are probably good for at least 5,000 rpm. Thats where we run our Velocity with 330h.p., 454's.

I Would Try A 21p That Should Put You Around 4900 Rpm.

I agree try the 21

You Could Also Have Them Labbed Which Will Help

anyone wanna trade for a set of cleaver 23p's for some 21p