Help Identifying

I have a 68 GTS that is missing its original 340.

Awe dang, I'm sorry. This motor came out of a rusted gt. Po said he stripped the whole car and was putting everything in this car. He still has tons of parts left that I didn't take because lack of space for it all.

Idk if I'd ever get rid of the 340. I don't know much about this engine but hopefully I'll learn to love it. I do think a new hemi swap would be fun one day .