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					Originally Posted by THEFERMANATOR  MELLINGS does still make them, part number 22118. And it is quite differrent in the duration and cam lobe design VS the truck cam, so I could only imagine how differrent it is from the combine cam. I found it at several places for $140.http://www.omnitek.co/mellingweb/Par...t=22118&From=A | 
	
 Well thanks to everyones help I think I have finally found the specs I need. There certainly is a difference in the 250 Marine cam.
Mellings 22118 seems to be the best one at $139.95. The link below shows a wide variation between the auto/truck/marine cams. I tried to post it as a pic but the PDF file is too large. (really it is only 2 pages)
Thanks again all!
Dodgerrr 
http://www.inliners.org/tech/cams250.pdf