3.54 dana, 9 inch converter and a badly rebuilt 727, it spools up to 4200 rpm but does not down shift on the track.

the current trans is OPW junk
Other Peoples Work that is junk

I have been thinking about a 518 overdrive trans.

The new auto will down shift under part throttle and upshift at 5500 rpm if i can help it in "drive". The governor on the tail shaft is key to this as well as valvebody and converter selection.

A trip to the chassis dyno will happen when i am satisfied with the transmission.

Thanks for the interest