You will find many early 1970 Monte Carlo and Chevelle's with 454's with NO VIN on the pad. It was stamped down on verticle "rough" casting nest to the oil filter. This is actually next to where the transmission bolts to the block. Most later 1970 Chevelles (February on) have the stamp on the pad. As a point of interest, 396 SS Chevelles were always on the pad from what I have seen with early 454 Chevelles by the oil filter. Go figure, they were made on the same line along with Monte's. I have never heard a good explanation as to why the 454 made a difference as to where the stamp was located. Production DID put all the stamps on the pad in the second half of the production year for all Chevelles. Since Monte's were made on the same line, I would expect this also to be the case.
If the VIN is not on the pad, believe me, it is by the oil filter and it is usally a "[you said a naughty!]" to see. Many times, the only way you will see it is with the engine out of the car as the stamping is in "rough" cast iron, not a machines surface like on the engine pad at the front of the engine. Many, Many 69 Z28 are also stamped here and they are small blocks. As a matter of fact, on Z's, if you see a VIN stamp on the pad after January 1969, it's probably a restamp as they were all stamped down by the filter when assembled in Norwood. California Camaro's were typically on the pad.
Point is, it's very probable that this IS the orginal motor. Look down by the oil filter and don't get upset if you do not see the stamp. Its VERY small and usually "lightly" hit because of the rough casting and usually greasy/dirty.
Vin stamps by the oil filter are VERY well known in other parts of the Chevy hobby. As Monte's become more popular, this information will filter to this part of the hobby.
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Mike Strinich
Nashville, Tennessee
72 Monte Carlo Convertible
70 SS 454 Chevelle Convertible
70 Buick Gran Sport Stage 1 Convertible
73 Buick Gran Sport Century Stage 1 Four Speed
67 427/400 A/C Corvette Coupe
67 327/300 A/C Corvette Converible
67 P.O.S. Corvette Convertible
65 327/300 A/C Corvette Coupe
66 Shelby GT-350 Vintage Race Car
[This message has been edited by mjs-13 (edited 03-29-2002).]
[This message has been edited by mjs-13 (edited 03-29-2002).]