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Ol' Ron · 08-10-2019, 10:20 PM

the merc 4" crank can be installed into the 36 Lb to early 38 21 stud block by boring to 3 3/16 and turning down the Mains to 2 .398 . THis has been done on many early blocks. I did this with a n 8BA crank just to see if it could be done. Wish I used a Merc crank.

Just remember"It's the journey, not the destination"

08-10-2019, 10:20 PM	#58
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,864	Re: 1CM Merc Crank In A 40? the merc 4" crank can be installed into the 36 Lb to early 38 21 stud block by boring to 3 3/16 and turning down the Mains to 2 .398 . THis has been done on many early blocks. I did this with a n 8BA crank just to see if it could be done. Wish I used a Merc crank. Just remember"It's the journey, not the destination"