Sounds like you might have more problems than you think, I believe that the valve/pistons interfere if the timing goes off like you describe. I'm sure that someone who knows more than me will chime in and be able to help you more than I can.

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1985 300D Turbo ~225k
2000 F350 (Powerstroke) 4X4, SWB, CC, SRW, 6spd ~148k
1999 International 4900, DT466e (250hp/660 ft/lbs), Allison MD3060 ~73k