I have a 63 IIa, 2.5. Not going to upgrade engine, or add a lot of weight. I don't pull heavy trailers. Is there any reason to upgrade to the 9.5? I have both, but unless it's a big improvement, I really don't want to pull the FW to have it skimmed and go thru the 2-4 week machine shop wait. I'd prefer to just stick in the 9 inch and be done.
tim
tim
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