Question about a part number

**Mr. Chevy** · #1 09-25-2007, 05:12 AM

Greetings, I was just double checking a Chevrolet water pump number. Numbers on the pump read as follows:

GM 4
3969811 TX

By my calculations this is a correct water pump for a 1970 Nova or Chevelle w/big block L78 & LS6 Car correct??????

Thanks guys!!

Rich

**Mr70** · #2 09-25-2007, 05:40 AM

Passenger-Chevelle-Camaro-Nova,all the Big Block motors used it from I believe middle of 1969,through 1971 model production.
396/350Hp & 375Hp-402/300Hp-330Hp-350Hp & 375Hp
454/345Hp-360Hp-365Hp-390Hp-450Hp.
Look for the casting date off to the side,angled downward to the far left of the GM 4.
Something like H 5 9-for August 5th,1969,or B 11 70,for February 11th,1970.

**YENKO DEUCE REGISTRY** · #3 09-25-2007, 04:48 PM

Same position as this 065 pump?

**Mr70** · #4 09-25-2007, 05:36 PM

Yep..and basically the same vehicle applications as the earlier released 065 pump too which also came on the 427cid.
Unusual,but there was some overlap on these two pumps,so not impossible to find an 065 on a 70 model,or a 811 on a 69 model.

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