dist gear shim

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   Got this answer from RobbMc performance some time ago.  He was formerly an engineer at Mallory (I believe) so has some experience with these things.

"The minimum endplay is .010" to allow for expansion of the aluminum housing. Maximum endplay is debated but I like to keep it under .030".

When you drill the hole, make sure the hole is lined up with the oil pump drive tang.

Use the washer between the gear and the housing but make sure the OD of the washer is no larger then the root diameter of the gear teeth or the washer will rub on the cam gear. I've seen Mallory AMC distributors supplied with the Chevy washer which is too big. If I remember correctly, the AMC washer is 7/8" OD.

Be sure you have the washer in place when you drill the shaft."

Robb make some good products for AMC's.  Check his website at http://www.robbmcperformance.com/

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bobsterfl Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Nut Joined: Jun/18/2009 Location: Orlando, Fl Status: Offline Points: 261	Post Options Post Reply Quote bobsterfl Report Post Thanks(0) Quote Reply Posted: Mar/13/2018 at 3:05pm
	Got this answer from RobbMc performance some time ago. He was formerly an engineer at Mallory (I believe) so has some experience with these things. "The minimum endplay is .010" to allow for expansion of the aluminum housing. Maximum endplay is debated but I like to keep it under .030". When you drill the hole, make sure the hole is lined up with the oil pump drive tang. Use the washer between the gear and the housing but make sure the OD of the washer is no larger then the root diameter of the gear teeth or the washer will rub on the cam gear. I've seen Mallory AMC distributors supplied with the Chevy washer which is too big. If I remember correctly, the AMC washer is 7/8" OD. Be sure you have the washer in place when you drill the shaft." Robb make some good products for AMC's. Check his website at http://www.robbmcperformance.com/