I hope this water pump is for my 1972 454 auto,PS, PB,AC
Forum: C3 Engines, Driveline and Handling
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20M 3858284
what is the coding format for water pumps?
thanks
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22714
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
It is the correct part #(3858284) for a big block of that era. Need to look for the casting DATE to determine if it is "correct" for the car, if you plan on having it Judged. Depending on the pulley used, the casting date may not be visible for judging, but it never hurts to have the correct one. Also, if you look closer, you'll see the "20M" is actually "2GM". 
Joel Adams
C3VR Lifetime Member #56 
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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in Forum: C3 Engines, Driveline and Handling
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