Quote:
Originally Posted by KiWinUS
Merc 4inch stroke crank does NOT need welded to get 4 1/8 inch stroke. It gets offset ground to the small 2 inch pin size. Hence the use of the 21A or 91A rods.
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Or the aftermarket H-Beam rods with insert bearings. In today's world, it is actually about the same $$$ to buy a new set of H-beam rods and run the small Buick bearing . . . as it is to find a good set of 21A rods, have them rebuilt and then find a set of full-floater bearings to go with them. And, you have to hand-fit the full-floater bearings (with a rubber mallet and usually some ScotchBrite polishing to get them to correctly float - not that many shops/folks know what this is all about in todays world).