I can't tell ya about galaxie boats but you have a good start with the Chevy engine and the Berkeley pump.The Berkeley insert pumps E and F had one piece bowls the F had a Berkeley "Trim" diverter are the least desirable the B G and C are a good start the B and G will have 2 piece bowl that allow the addition of a droop or wedge where the C with the one Piece will not.
MikeW