Friend of mine just bought a hodgepodge of FE parts. We have identified one crank as a 1U. The other crank the guy swears was from a 410 but we can't find anything for numbers. Is there somewhere on the crank to look for markings?

Looks like Shady guessed 390hp.

476hp
422tq

Meant to say, stock heads? Any porting or anything?

I like number 3 followed by number 1. Aggressive lobes is kind of a  modern camshaft design. I also like the wide LSA VS  narrow LSA idea.

I have one of Scotts cams in my 390 in my 67 Highboy. Its been in there probably 15yrs.  When I talked to Scott he recommended the break in machine since it was a pretty aggressive lobe and said it could beat down a lifter. So, I had him put it on the machine. It was $60 back then. After a few weeks of running the engine I started having lifter noise upon start up. I believe its only one, maybe 2 lifters. They quiet down after a few seconds so I've never replaced them.  Once in a while one will really tick upon start and it will hammer for a while. I have talked to Scott about it and he said it could have been the aggressive ramps on the cam but I just never have replaced them.

So for someone who doesn't know. Is 42cfm a big gain?