x heads

Locomotion said
BJR, You might want to double-check that. X's were used up through, I believe, 1970 - casting # 2531894. Then in '70 and '71, they started with the J-heads, which were cut for both, 2.02" 340's and 1.88" 360's. Then both engines were 1.88" in 1972.

That's great. I just luck out and have a 72 340. But I knew when I bought it that it had the 360J heads.