I have the solenoid now I need to figure out where it mounts. Looks like somewhere on the back of the motor?? Does anybody have a picture?

It mounts on the rear of the passenger cyl head.

You might already have this info? It's out of my 71 dodge challenger and dart service manual.

I was just looking through it and it reminded me why I got into cars. I remember my old boss 30 years ago fixing his 76 dodge van with his service manual open on the front seat. He fixed everything on that van from his service manual. It inspired me to do the same, ahhh the old days.

Thank you so much Challenger1

I wouldn't have guessed it mounted on the back of the head.

Thanks for posting the pages too, I've been trying to find out what the tranny solenoid does exactly.

Yep that's correct as shown. Same page I've been unable to dig up but that's it as I remember it.

Could we get a close up on fig nr 14-for auto cars also..

Would this system be used on a stock '73 340 Cuda? This "piece", solenoid has some mounting hardware on firewall as well? Hose?