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Still looking for numbers on the block. I found some stamped on a shelf under the alternator but they don't make sense to me. Top number is 1m1226 and below it is 1vp ?.

Originally Posted by States

Still looking for numbers on the block. I found some stamped on a shelf under the alternator but they don't make sense to me. Top number is 1m1226 and below it is 1vp ?.

If that is IM it's a 69 350 255hp with a powerglide tranny used in passenger cars and police applications.

Small Block Chevy Engine Codes - Page 4