Quote Originally Posted by States View Post
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