340 build help

With 65,000 miles on it, It is getting close to the end of it's life. 40 yr old rings and bearings, and you go and throw a bunch of go fast goodies on it, the engine will not last long. do yourself a favor and freshen it up now while it is out, for less money; wait a few thousand miles and pull it out to have double or triple the amount of money needed to have it completely machined and rebuilt.
As far as cam choices, a Comp 268 or the Voodoo equivelant. It is better to go on the smaller side of cam selections especially if it will mainly be street driven.