Last night I spent half hour out in the garage going over the fasty engine that I have spare. I want to use the 1600 barrels and pistons (and maybe heads) on the 1300 bus engine that I have.

To determine the condition I did a compression test but his was not really conclusive as I could only turn the engine over by hand which didn't really give a suitable reading. Not deterred i decided to take the heads off and inspect them instead.