Bill - Jon has a standard heater, no Ranco valve, no cable controls, piece a cake, just the core, a fan/motor. case, variable fan switch .... for the Ranco, I found
this one at
a Volvo parts place, oughta fit, but spendy

I think the main difference in the valves is the size of the copper tubes, the car one was different than some year trucks, and Danchuk the 5-7 car guy is the one that had'em repro'd
Bill