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).
What is the correct water pump housing for a '70 or '71 big block (HEMI included) E-body?
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
My car is a BS23N0B, SPD was 908. I don't know that my car qualifies as a survivor, but I have owned it for about 31 of its 50 years. It has its original engine and trans, so I assume that the water pump housing is original to the car.
On mine the casting number is on the upper (driver's side) portion of the housing, however the casting number is upside down (see attached pic). I don't see a Pentastar on the pump inlet of mine.
Here's another older pic showing the heater hose connections (1/2" and 5/8") and the date stamp location below them.
could you make out that date in the full sized pic? :takealook:
No, but I will try to get a better look at it this weekend and report back.
From Mitchell Manuals , Dodge truck 383 water pump housings numbers.
61-69 3671315
70-71 2951806
Quote from: 6bblgt on September 12, 2019, 11:07:56 PM
could you make out that date in the full sized pic? :takealook:
I pulled the alternator off to get a better look and took a couple of better pics. Looks like 9-08 to me. Would this be August of 69 or September 8th of an unspecified year?
Right side manifold - looks like 8299 to me (date code is upside down on this manifold).
Left side manifold - looks like 8 4 69
Here are some notes I made on the head numbers when I was rebuilding the engine.
I have an original 666 casting intake, but I don't see a date code on it. I'll take a closer look at the block later this week when I am under the car again.