Roller Block Cams?

Rob_Mopar said

Hold on, the '81 isn't a roller block. A '91 is. They didn't phase in the roller cams until '86 on the 318, and '88 on a 360. Dropping the roller cam lifter dog bones and spider hardware in a non-roller block doesn't work. The block we used in my buddy's Challenger was an early '90's 360 factory roller block.

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Yeah no worries it is definitely either a 1990 or 91 block that I pulled out of a 1981 D300!
I have the roller lifters and spider hold down that came with it. When I first discovered the cracked heads were magnum heads I initially thought I had a complete magnum motor. A few years later I discovered it was a LA Roller with magnum heads.