| Okay, all this talk of snapped jackshafts has me concerned. Can anyone 
address a little history behind all of this. Like -  What bolt are we talking 
about being replaced by a stud and why? Is there a need to address jackshaft 
endplay during a rebuild or bearings, for that matter?  What has caused 
jackshafts to snap?
Seems to me it should have all that much stress unless there is a lack of 
lubrication or the bearings get worn and allow it flex when loaded and 
unloaded
The jackshaft in the U20 is a little unusual to be sure. Neccessary when 
turning the engine into the ohc we all know and love as I remember.
Well, what's the deal?
Rick Stayner
69 2000
Harrisburg, Pa
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