1974 340?

GTX JOHN said
You can pick up a pair of calibers that work
well at Harbor Freight or similar place for a
very low investment compared to a set of Mics.
I always bring then parts hunting!
They have saved me numerous blunders!

Yeah, that's my fear. I'm cleaning out so would like to sell the motor. Don't want to screw someone or myself over so need to figure this one out.