Ok. I have a 47 frame that used the single center mount for the rear of the cab. I have a 52 cab with the shackles that is going on this frame so I will need to drill the frame for the shackles
In the assembly manual, section 1 sheet 3.12 states the following:
Shim used to maintain .76 dimension between floor panel and top of frame.
So do they literally mean the floor pan or the floor support where the shackles mount? The floor support is 3/4 of an inch all by itself so .76 to the floor pan puts the floor support basically right on the frame.
The .760 -.820 is from the bottom of the support. I've attached a picture from my 1954 3604. Its difficult to tell due to the angle I took the picture but the distance is .775 on mine as I rebuilt the rear shackles and replaced the front mount rubber and bolts.
Ron - - Dusty53 1954 Chevy 3604 In the Gallery Forum "You can't dance with the Devil and then wonder why you're still in Hell." "They will forget what you've said, and they will forget what you have done but they will never forget the way you made them feel."
Dusty53, That will do it. LMC sent me a bunch of round and square rubber shims and said good luck Ed. I think it is a matter of who was on the assembly line. LMC sent them free because I have used them almost exclusively for about 42 years. Doc
Currently making 1954 3100 better than new and Genetics