Overdrive conversion

[360dakota]

dumping a 360 (carburated) in my 94 dakota. not going to use the PCM. PCM controls overdrive off button. Is there a way to make the overdrive button work with out the PCM or is there a conversion kit out there. i found one coversion kit but its for the 518,618 tranny. I have the A500 42RH.

thanks