To my knowledge there is only one length of rod for the MEL. There were in fact different oil pumps (1 wtih vacume and 1 without), but both used the same rod that I know of. The FE rod is identical except it is 3/16 shorter. The 427 HP FE had a special pumpand the rod may be different again. AS to a HD rod for the MEL? There is none. I used a HD rod from an FE, and milled off the pump mounting surface by 1/8th and moved the drive gear on the distributor up 1/16 inch and it works great.
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