KB167 vs KB399

Unfortunately, I do not know what year the engine was cast. The tag attached to the motor identified the alterations made to the crankshaft and cylinders and showed it as being remanufactured in Winnipeg, MB in 1983.

The block is wrapped in plastic after its dip in the hot tank so I cannot look it over clearly until the weather warms up and I can unwrap it for further work/paint. Can anyone please tell me where a 318 block might be stamped with some kind of a serial number so that I may be able to determine the year of the casting? Also, could a link to a suitable decoder be made available?

I knew about different compressions for different years; the Keith Black site is good in that regard. I did not know about different heights for the KB pistons. Thanks for that.

Based on the new information regarding the 340 heads, I will definitely be using the KB399s for the incremental cost difference. Ultimately, I will bring the block back to my machinist when I bring the other parts in for balancing so that he can measure the four corners with a new piston. From there, I will then have what I need to decide whether or not to have him mill the deck.