Ernie, I was watching your thread (s?) earlier on your unfortunate experience with the rollers, good luck on your rebuild. I got a lot of satisfaction from putting mine together, you will too. I've got Le Mans rods and crank, E-brock heads with the big valves, 10.7:1 compression, roller rockers, Comp Cams 282S (that's a flat-tappet) set straight-up, and dual Holley 600s on a Ford intake. FWIW, I really like the cam, it has a nice lope at 750-800 rpm idle, and makes plenty of power.
R U Yella, sorry, didn't mean to hijack your thread...I agree with one of the posts above to check the hash marks on the rear seal area of the rear journal on the crank IF you're not assolutely SURE of where the crank came from...but before you go through that effort, just be sure it isn't a leak from one of the areas at the back of the block (cam plugs, intake/block/head seal, etc.). The dye may show you more about
oil leaks on your motor than you really wanted to know! :-) But that would be a good thing, it'll give you something to do on those nasty winter days when you can't drive the car anyway!