318 vs 340

66dartgt said
Mopar was supposed to have stamped the engine size and vin on the front of the block just below the drivers side head. I've not ever been able to find one. The only sure thing Ive ever seen is the casting number in the side of the block below the exhaust manifold just as the other guys have said.

I found it stamped on my 79 360 just below the drivers side head on front of the block. Also seen it on a 318 before. Both times the stampings were very light and I had to scrape the paint off to find it because the paint actually sunk into it so you couldn't see it.