>I recently purchased a 1975 model year 351W
>that was originally installed in a E-series
>van and later transplanted into a F-series
>pickup. Currently, it has a flexplate for
>automatic transmission in it, and I want to
>convert it to a manual transmission flywheel.
>The question I have is this:
>
>What is the balance on the 1975 model 351W ?
>The flexplate on this engine seems to be zero
>external balance, like the I6-300; I cant find
>any additional weights welded to that flexplate
>anywhere. The flywheel I have for a 302/351W
>has the standard 28 oz balance on it. Did
>someone change this engine? or did they just
>put the wrong flexplate on and get lucky that
>the engine didnt tear itself apart?


All 351's are 28oz. Only the 302's changed. Typical Ford! LOL!!

Seems strange about your flexplate. All mine,302 or 351, have a weight welded on.