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Re: 1972 GMC Original Engine Tranny and T-case
3970010 is just a basic 350 casting number, used on almost every 350 you'll find. there is another number that can tell you more though, called the suffix code. it will be on a little "pad" on the passanger side, right behind where the water pump bolts on. there will be 2 sets of stamped numbers. you will need the last 3 numbers/letters off the taller set of numbers
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ASE Master Certified-GM Trained-Mechanic
1968 Chevy C30 157" WB Wrecker
1969 Chevy CST/10 SWB
1971 Chevy Custom/10 (first truck) 350, NV3500 5 speed
1971 Chevy K20 Custom Camper 4x4 350 TBI, SM465/NP205
1974 Chevy Custom Deluxe/10
1979 Chevy Custom Deluxe K10 farm truck beater
1989 Chevy K2500
Quote:
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Originally Posted by Alan Jackson, Cause I'm a country boy
35s whinin on the asphalt, grabbin mud, throwin up some red dirt
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R.I.P. Michael Stilts... I will always love and miss you brother! (9-12-80, murdered 4-9-05) 
Last edited by Blue_71; 09-07-2008 at 03:01 PM.
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