The Ford Barn

lonewolf · 05-22-2014, 09:58 PM

I just picked up a 8ba style motor and the crank flang that the flywheel bolts to is at least twice as thick as my mercurys crank. Is there a difference in car and truck cranks? Buy the date stamped in the motor its from 1953.

scooder · 05-23-2014, 03:46 AM

I don't think there's ment to be a difference. But I've seen all sorts of odd business going on with the cranks, some have Big cuts on the front of the front counterweight to clear up front. Seems like sometimes the crank wasn't located properly in s machining jig, and all the machine work was further back, or forward than its ment to be. Maybe, just a thought I had.
I think if you measure the flange face to bell face hight, if it's the same as another You have with the thinner flange, your good to go.
Martin.

rotorwrench · 05-23-2014, 11:10 AM

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They made a change in 1951 for the Merc-O-Matic & Ford-O-Matic trans converter mounting but that is the only noticable change that I'm aware of. FoMoCo made a lot of subtle changes but many are not so noticable and a lot are just the way they cut the cranks apart when they came out of the mold prior to going to the machining processes.

05-22-2014, 09:58 PM	#1
lonewolf Senior Member Join Date: May 2010 Location: Michigan Posts: 464	car vs truck cranks I just picked up a 8ba style motor and the crank flang that the flywheel bolts to is at least twice as thick as my mercurys crank. Is there a difference in car and truck cranks? Buy the date stamped in the motor its from 1953.

05-23-2014, 03:46 AM	#2
scooder Senior Member Join Date: Jul 2010 Posts: 2,593	Re: car vs truck cranks I don't think there's ment to be a difference. But I've seen all sorts of odd business going on with the cranks, some have Big cuts on the front of the front counterweight to clear up front. Seems like sometimes the crank wasn't located properly in s machining jig, and all the machine work was further back, or forward than its ment to be. Maybe, just a thought I had. I think if you measure the flange face to bell face hight, if it's the same as another You have with the thinner flange, your good to go. Martin.

05-23-2014, 11:10 AM	#3
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,426	Re: car vs truck cranks Sponsored Links (Register now to hide all advertisements) They made a change in 1951 for the Merc-O-Matic & Ford-O-Matic trans converter mounting but that is the only noticable change that I'm aware of. FoMoCo made a lot of subtle changes but many are not so noticable and a lot are just the way they cut the cranks apart when they came out of the mold prior to going to the machining processes.