...saw
this ad for (K30) factory speed and cruise control in the parts section, so I took a chance on retrofitting it.
I had to design up some custom brackets to adapt the cruise servo to this motor, as the factory rear throttle/cruise bracket doesn't work with the vortec-style intake mounting. Rest of the install was pretty straight forward with the exception of having to drill a 1 5/16" hole through the freshly painted firewall haha. I also couldn't find a correct length upper speedo cable being reproduced, so I had one made up by speedometercablesusa.com, which was nice as they added the factory grommet to it so I didn't have to wrestle that afterwards...