I have a LS! & 6 speed in my '56. When I cut off the wiring
that was not going to be used from the ECU, smog, and such,
I left the Cruise Wiring,, just in case.
I still haven't installed the Cruise, several othter projects
are ahead of it. Some Day/////
But, here is some info on early Vette, Camero and Firebird ECU's
that I researched. This is just a brief intro.
I purchased a used Firebird Camero Cruise module. It is a controller
with the cable and motor drive that connects to the Throttle Body.
The Cruise will need awire harness with several wire connections
from the ECU.
The ECU provides several control connections to the cruise control
module, including VSS, vehicle Speed,
As I recall one end of the double brake light switch connects
directly to the ECU.
I planned on,,,
Using a pair of the wireless modules [minature] the receiver has
several relays. My objective was to mount the wireless transmiter
on the steering wheel and power with a 9 VDV battery, a
few buttons and I'm set. The modules are inexpensive and reliable.
Then use the wireless receivers relays to interface with the Cruise
Control module.
Someday I will complete the install. It is not that difficult to wire. You can use simple push button switches and mount them anywere.
You will need a schematic of your ECU,
the BCM [Body Control Module] and
CCM [Cruise Control Module]
from the specific car your engines ECU matches. With the schematics you can develope the wiring interface.
If you decide to go this route I'll be glad to assist with the wiring
I'm an Electrical Engineer and have completed several of these and ECM mods.
Good Luck,,
Michael.