Morel 5321 lifters...

It may just be differences in early 1968 340" block and head castings but my Morel 5321 lifters did not clear my X-heads while bolted to the block so the heads had to be pulled back off to install the lifters. (5/29/67 head castings and 6/22/67 block casting).
After they were pulled, all was good until the #8 cylinder lifters were about to be installed. Then the block had to be massaged a little with a die grinder after some extensive taping and rag placement. The tie bar and tie bar stud in the lifters heavily contacted the block.
All is good now but don't be like me. Test fit ASAP.

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