There are thousands of big block water pump housings out there, the majority of the "muscle car era" big blocks used casting number 2780987 (1967-1971).

GG's "white book" shows two part numbers:
I think the difference in part numbers is due to the tapped holes for the heater hose fittings.
2780988 - ABC-bodies '67-'69 * 2 x 3/8"NPT tapped holes (5/8" heater hose)
2951806 - BCE-bodies '70-'71 * 1 x 3/8"NPT & 1 x 1/4"NPT tapped holes (5/8" & 1/2" heater hose)

1969 Parts Catalog shows one part number:
2780988 - ABC-bodies 1969

1970-'71 Parts Catalog shows two part numbers:
2951806 - BCE-bodies 1970
2780988 - BCE-bodies 1971 Did Chrysler Corp. go back to 2 x 5/8" heater hose for 1971??

Who has a "survivor" type car that can comment on the style of 2780987 water pump housing, date codes & with or without a pentastar? Please include Year, Assembly plant, and SPD.

Does somebody have any '67 to '71 Truck Part Catalogs? What are the big-block truck part numbers?
FYI - '72 Truck w/400 shows #2951806