Best Year for Mopar 360 LA Engines

66dartgt said

Heads on an earlier 360 (71-72) would be the same casting as a 340 - a "J" casting. J's are supposed to be 99% the same as the "famous" 340 X castings, just add 2.02 intake valves and you are there. I would probably not bother with the older iron heads and just go for some eddies or a magnum conversion.

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FWIW, all 340/360 heads have the same port size/shape and chamber design until the 308's arrived on the seen in the late 80's and then the magnum heads in the 90's. The only difference in the early 340's is they had 2.02" intake valves. So which head you have is not of concern unless they are 308' or magnums.

2.02 valves in a low compression 360 is not a good choice. The choice between motors should be made based on which is better shape.