Successfully installed the Rostra cruise control. Thanks to Brian’s installation instructions, all went well. Contorting that cable mount bracket was a royal PITA. Had to troubleshoot and realize I spliced into the wrong wire for the neutral safety switch (NSS). My fault for not looking closely enough at Brian’s photo of the plug. Interesting note, when testing the vehicle speed sensor (VSS), the diagnostic LED simply flashes repeatedly, no longer coinciding with the rotational speed of the rear wheel. This agrees with the Rostra documentation as well.
Cruise works very well in 5th and 6th gears, I may try to adjust the dip switch settings and quicken the proportional gain (dip switch 2 to ‘on’), but overall, it works great.
Again, Thank You B.D.F.!