Maximum rpm for SB

More importantly for every engine in this post, is "where does it make the most power". A stock cam and valvetrain just cant spin past around 4500 in the case of 318/273s. The cams and springs wont do it. the 340/360s can go a little over 5, but again, they will give float fairly low. If you change the cam and springs, you may raise it, but a street sized cam, isnt making power at 5800. So you dont need to rev it to there. The majority if dual purpose cars are being shifted too high anyway. Taje them to the track, and start with a shift point of say, 4500 and work up. As the times get faster, raise it, when they stop getting faster, you've reached you real shift point. RPM of valve float is the dead last thing you want to know. Because at that point, you already gone way over peak hp, and are in "possible damage" zone.