Hot Rods Dumb speedometer question

I have a dumb question for all you guys that love to swap 350 Chevy motors into everything, I'm a die-hard Mopar guy, and I have never owned a crossbred car, but I just picked up a 1946 DeSoto that already has a 350 with a 350 turbo swapped in, does anyone know if they make a speedometer cable that will work with the Chevy transmission and the original DeSoto speedometer, I would like to use the original speedometer and not put an aftermarket or GPS unit in the car, any help would be great, thanks

 

Rusty at Speedometer Service in Colorado Springs should able able to fix you up. @e1956v here on the HAMB. He is an alliance vendor. He made a cable to mate an AOD to the original speedometer in my '54 Ranch Wagon.
https://www.speedoservice.com/

 

Before you get to complicated here, look at the speedometer, see what fitting it uses. Is it a normal 5/8" thread, like GM used on theirs from the 30s to the mid 60s? If so, just get a normal speedometer cable for one of those Chevys, and you're done. If it's different, then look at an original speedometer cable for the car, see if it has the 7/8" thread end for the transmission, which would fit right onto the Chevy transmission.

 

Thanks for the info, I haven't got the car yet, it should be here Sunday, but from what the former owner said it didn't have any cable at all, I'll check it out as soon as it gets here, I just figured someone who's done one of these swaps before would have an idea

 

I just sent him an email thanks

 

He'll probably recommend that you get the speedometer rebuilt, which would be a wise move...

 

The Desoto and Chryslers of that era need to have a deeper nut on the speedometer end, a standard 5/8-18 speedometer cable nut won't work because of the collar that Moto Meter/Auto-Lite speedometers used.
Good news, I got nuts.....the right nuts.....speedometer cable nuts

 

And just a snap of your fingers , “Bobs your Uncle”.

 

Went to the Chevy dealership to get some lug nuts for an off topic vehicle. As parts person was looking them up by model type he asked "what do your nuts look like?". We both laughed are asses off the moment that question ended.