RPM

[305chevy c-10]

well i already have screw in studs and guide plate with hardened rods ,1.5 rollers .550 lift  springs

[Captkaos]

on the 2 bolt thing, I along with several people have found that 2 bolts are stronger than 4 bolts, if you want ultimate strength (overkill for a street vehicle) get a 2 bolt and add splayed 4 bolt caps.  I wouldn't think twice about a 2 bolt.

[westsidek20]

Ive read that the camshaft's working range is the range that you get the most power, and anything under or over that still generates power but not as much.
So taking "305 Chevy" example of a 5500 range cam, is 5500 the redline or can he go over that? 

[Captkaos]

going over the rpm range is over revving and if range ends at 5500, there is no point in spinning much over that.

[305chevy c-10]

good info thanks ,i do have the bottom studded though

[VileZambonie]

Valves not closing (floating)

RPM does not = power. Operating in your peak power band is what you should be concerned with. An engine with a shorter stroke will rev more quickly and to a higher RPM than that of a longer stroke. Trying to make an engine that changes reciprocating motion into rotary motion and rotary motion into reciprocating motion there are going to be physical limitations for all of the factors mentioned in the previous posts. If you want an engine that turns high RPM build a rotary engine. I've never seen anyone build one and slap it in an old steel Chevy