I dont recognize the flooring, but when you say time the oil pump. Do you mean align the pump to shaft? Im starting up a 251 that came to me with out a distributor and the pump and cam are mechanically connected.
Im building my distributor and i will need to time my distributor shaft because i cut it off to switch some bits around and extend it .250 or so.
I am hoping your aligning as opposed to timing. (Tomatoe, tomahtoe) but i dont trust the averaged information A/I on the google searches these days.
The gear drivien oil pump is messing with me a bit. The pump to cam relationship is fixed unless we take it apart. Did you pull your pump and cam?