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Hello, My name is Rob Gary, I live in Navarre Fl. I have been a hot rodder since 1970, having owned a 67 fastback mustang, 69 vette, 69 boss 429, 70 340 swinger, Z28etc. I am currently finishing a 1972 340 swinger, repossessed from a local resto shop. Engine rebuild includes balanced and ported...

neil thanks for the response. I agree with you. The lifter preload was .080-.125. At .125, no compression. At .080 per hughes, the lifter issue returned. finding out that the lifter travel on a variable duration lifter was .140, when the lifter bleeds down at idle, what do you do with the extra...

SMCARNUT, Thanks for the info. I verified this twice then turned engine over by hand and watched before startup. This has happened twice. I found that with this retainer, you can move it to the one side and the other lip gets unseated. I.E., The OD of the retainer is too small for the ID...

I have installed these on a 1972 340 engine. I have had an issue with the lifter retaining ring popping off after a brief run period. Two different lifters. I triple checked pushrod seating during lash setting and rotation before firing up on run in stand. Lifter preload has been set at 1 turn...