73 318
What works good in a 318 is as close as you can get for an equivalent 340 factory cam, er at least a modern version.
I'm running a 70's 318, factory heads and pistons. Headers, Ed Performer, was Ed 625/ 650, and it's snotty as hell. Manual shift TF, 3.70 gears and tall tires give me about 32--3400 RPM at 70