Anyone local to me capable of correcting errors on a 904 race build

first i ever herd this,... any body comferm this right or wrong???
I believe there is a difference in spline count.
I would say that depending on what is available in the aftermarket converter market, you may be able to use either one.
But with this late 80,s lockup model things are not that simple as to just change the input shaft.
See my other posts.