What oil pump should I put in my 68 390GT HertzG?

Not sure which oil pump I should be using. The standard Melling M-57, M-57B or M57-HP ? I am thinking the M-57B.

I am making the standard oil mods to the block at the oil pump and at the main bearings as shown here:

thoughts ?

I would send a standard M57 pump to Doug at pumpbuildr for rebuild. He is Precision Oil Pumps.