Will old custom 30 pin car interface work with new classic?

Question

My faithful 60GB 2004 iPod Photo just went to hard drive heaven after 10 years of faithful service, while sitting in the car continuously in weather from -10 to 110 degrees.  Thank you, Apple for all the tunes!!
I still have a custom 3rd party interface that was installed in my 2004 Toyota Camry and connected to the stereo/NAV system. This was back when these interfaces were still new pieces of tech - and I paid a few hundred dollars for the device and its installation.
This device powered the iPod Photo and fed its audio (and some control functions) to the stereo/NAV system.
The manufacturer name on the connector coming out of the hole in the dash drilled for it says "Peripheral."
So... ...I plan to keep the car a few more years and I need a new iPod.
I know some of the the pinouts on the 30 pin connector have changed over the years, and my question is if there's a reasonable chance this interface will power a new iPod Classic and play its audio feed correctly?
If it won't work, I'd prefer the added functionality of an 64GB iPod touch over the Classic (Apps, camera, just enough storage, etc.), even if I have to power it via a 12v power port and find another way to get sound into the car system. 
But if it will work, I'd prefer to just be able to keep using the interface I have and buy a Classic, as I have my apps and a camera, etc. on my phone already.
Other details:
1. I haven't looked into getting sound into older cars without AUX inputs for years, and the last ways I remember were FM transmitters and cassette tape adapters that plugged into the headphone jack. So I don't know if there are other ways these days. And, no, the car does not have a cassette tape player.)
2. If the interface will transmit power and sound, the control functions are less important - as I usually controlled the iPod with its own controls. But I suppose there's a chance the interface could interfere with these??
Any comments or advice are much appreciated.

Answer 1

46 (and counting) views... ...and no opinions??  Somebody?  Anybody....??  Oh well.... ...it is an obscure question.
Anyway, I did talk to Apple Care and they suggested I go to an independent Apple vendor with a used Classic in stock and see if they'll let me plug it in to check if it works, and that may be possible in my area.  So will likely "try to try" that if I don't get any other input.....