The International Cessna^® 170 Association

Thanks for the info. The last paragraph from Karl's "From the Cockpit" is also encouraging:

"In closing, I'll pass on a tidbit some may also be interested in. I'm told that at this year's AirVenture, there is a scheduled announcement of an STC-approved autopilot installation for our C170Bs. That's all I can share now; I hope to have a lot more to share by the time of our September convention. Until then…

Fly safe, have fun, and keep in touch. Karl"

It's Trio Avionics. I ordered mine at the show. Approval awaiting FAA signature when I spoke with them last week, all other work done. I've got the installation guide. Still needs appendix for 170B.