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Jason S. 12-18-2012 08:59:20 204.54.36.245 Report to Moderator	Combustion chamber size and intake valve sizes are different between the two heads.Seems like there was a thread on here that said the cooling passages was different between the two heads but I don't know on that one.But the book states they arent interchangeable. They will physically bolt on, but arent meant to be interchanged.They never cut corners but the block is greasy? If they rebuilt it and didnt clean the block chances are they didnt clean much of anything else when they rebuilt it.Thats my opinion anyway.I think you would be better off to have your block fixed instead of buying another motor that may have a cracked block also. If it was me, I would ask to take the oil pan off and look.If they wont agree to that, I'd walk and find another or have your block fixed. [Reply]   [No Email]
upnorthwi 12-18-2012 10:03:56 76.2.221.25 Report to Moderator	I tried looking on here to, found some old posts that they interchange but thought there was newer posts that said they don't. I know the valves are different and some parts are the same, but when I don't know I'll ask here or stay with the belief that Ferguson knew what they were doing. I guess now that you say it, I might as well tear mine down. I guess the thought was if my block is junk, I'm in a bad position of finding another where-as if I buy this one, I should have a good block. If I end up with 2, I should be able to sell it and get some of my money back.   [Reply]  [No Email]