"Milk Can" lifters for 216 and 235 engines are the same as GMC lifters. There are several new ones on Ebay, singles and sets. Since the old lifters are mixed up, either have the ones you still have resurfaced and buy one new one, or put a full set of new lifters into the engine. Getting the cam reground at the same time would be the ideal situation. The new milk can lifters we put into John's 261 engine were flat-bottomed, so anyone with a tool post grinder for a lathe can refinish your old ones. Newer design lifters have a slight radius on the bottom to help them rotate, so a special radius-grinding fixture would need to be used for refinishing that type of lifter. I'm planning to build one of those items so I can re-crown old lifters, especially the scarce OEM 235 hydraulic lifters. Small block V8 lifters are so inexpensive they're not worth the effort of refinishing the old ones.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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