Maximum rpm for SB

rpm?

eleventy billion, sounds familiar??

LOL< depends on cam, valve springs, and crank,{forged/cast}
as well as the quality of the balance,of the engines rebuild;
and the crank dampener/harmonic balancer.


5,500-6,200 I would say is the normal "street" limit.
The more cid,the less rpm, normally.

My 2 cents.