A904 has reverse no foward

Ok, this is the story, 75 duster 360 from truck a904 from 81 imperial, was driving, lost motion till I turned the key off, restart drive for about 1/4 mile lose everything, had trans rebuilt prior to install, so it was rebuilt, did not replace converter, ok so removed trans pan, found nothing out of the ordinary in pan, some clutch material ect. remove filter, found that the speedo gear pieces I installed (wrong) chewed up on top of filter, removed trans and inspect a few things, reverse band good, both drums and clutch disks and steels still in good shape, replaced pump(found gouge) replace converter, reinstalled, now I have reverse and no drive at all, thinking no pressure in valve body possible plastic from gear stuck somewhere in vb. Any other suggestions would be greatly appreciated, and again, thanks a bunch in advance