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sbc500hpchevelle Oct 1st, 09, 10:21 AM Trying to figure out if I have an M20, 21 or 22 and what it originally came in. Has 26 spline Input and 32 spline output 3925661-case 3088336-case P1B11A-case 11W202164-case 3978764- Tail shaft 3952648-inspection cover RixLS6 Oct 1st, 09, 10:33 AM M20 out of a `71 Nova, by the numbers you posted. DaleM Oct 1st, 09, 10:35 AM Trying to figure out if I have an M20, 21 or 22 and what it originally came in. Has 26 spline Input and 32 spline output 3925661-case 3088336-case P1B11A-case 11W202164-case 3978764- Tail shaft 3952648-inspection cover Based just on the numbers, the P1B11A indicates: P - Muncie 1 - 1971 B11 - February 11 A - M20 Partial VIN, 11W202164, indicates it's from a car built at Willow Run (W) and Novas were built there. sbc500hpchevelle Oct 1st, 09, 10:39 AM Cool, thanks guys :thumbsup: VPofGreen Oct 1st, 09, 12:15 PM Hey Guys, Quick question... on a warranty replacement M22, is that stamped CC3 and then followed by a serial number? Anything else to look for to verify it was a true warranty swap? (besides dealer receipts) Thanks, Mike AZCamino Oct 1st, 09, 2:16 PM Hey Guys, Quick question... on a warranty replacement M22, is that stamped CC3 and then followed by a serial number? Anything else to look for to verify it was a true warranty swap? (besides dealer receipts) Thanks, Mike Look for CT followed by a number, similar to the CE replacement engines. T instead of E. | ||