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Brian · 12-02-2017, 02:01 PM

Hi Gary, Thank you. It is morning here, I've thought on this and decided I'd machine another .040" off the one boss of each piston to give me a .060" clearance. Just came on here and you've verified that figure, so thank you!
Knowing now what I do, I'd have been better off in all respects if I'd purchased a genuine 49-53 Merc crank, and machined it to suit my early block application. Hindsight, ain't it great?!!

12-02-2017, 02:01 PM	#20
Brian Senior Member Join Date: May 2010 Location: Masterton, New Zealand Posts: 3,836	Re: How do I fix this?? Hi Gary, Thank you. It is morning here, I've thought on this and decided I'd machine another .040" off the one boss of each piston to give me a .060" clearance. Just came on here and you've verified that figure, so thank you! Knowing now what I do, I'd have been better off in all respects if I'd purchased a genuine 49-53 Merc crank, and machined it to suit my early block application. Hindsight, ain't it great?!! __________________ Unfortunately, two half wits don't make a whole wit!