Dan you can't assume that the guy before ya set this engine up the proper way as far as having No.1 at 10 oclock on the distributor. By pulling the oil pump drive shaft which has the cam to dissy gear on it you can change the location of No.1 by just remeshing the gear a couple teeth one way or the other.
Take Longgones advise and first put No.1 at TDC at the end of it compression stroke and go from there.
Terry