Thanks Ashyers. On the below image - the short tube you mention to clean - are you talking about V or J? Is P the actual PCV Valve?? After it's running smooth with the valves closed, I open the system by pushing in the T-Handle on the dash and the engine does idle up a bit and then starts to do the ...

Another quick update. When the valves are both parallel (open?) I notice that my add on inline fuel filter (right before the carb) looks likes it's starving for fuel. The fuel filter starts to empty and then runs rough and it refills and runs smooths again until the filter starts to empty. With the ...

This is my 2nd M37 restoration. I can definitely post some pictures. When I pull the fording knob - both valves turn to the 90 degree position. With the fording knob pushed in, both valves are in the parallel position. In the parallel position (I would call this open), I get the alternating smooth i...

I picked up a '51 M37 a few weeks back and am working on changing fluids and finding out what I've got! Love getting my hands dirty with old trucks. My truck idles and runs better with the fording knob pulled out. Any ideas why this would be? I've read that you shouldn't drive it this way, but when ...