Quote:
Originally Posted by mikeforte
BTW, I believe that Ford went to 6 bolt because they knew of the 302 and most likely knew of the 351-W and the increased power would be better behind a more stout 6 bolt pattern bellhousing.
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Whether or not these were on the drawing table in '64, I don't know... that seems a little early.
Quote:
Originally Posted by mikeforte
Remember the 5 bolt 289 started as a 221, 260 and then 289.
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My point, exactly Mike. And as the power grew they may have started to see issues with things coming apart, especially with racing. Thus, they made a change in the back end of the engine.
I was hoping that someone with some inside knowledge would post on it...