Mine is studebaker m33503 and it has the tapered boom which fits your analysis.I’ve never noticed before that there were two different booms for m60s and m108s.
Type A: Tapered
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Type B: Straight and looks to be taller towards the hook end.
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The one with the “heavier” boom is a 1953 s/n m35xxx. From what I’ve seen other 1953 studebakers with lower serial numbers have the tapered boom while later trucks seem to have the heavier boom.
If that's the breather/vent coming off of the valve covers on the engine, only the fuel tank vent line should be connected to it...DO NOT connect vent lines from the master cylinder nor AirPak to this breather! There was a printed publication that came out saying that the engine/fuel/oil fumes would contaminate your DOT-5 brake fluid and possibly damage seals in your AirPak/master cylinder. Just free-vent your AirPack/master cylinder line behind the air filter housing, sort of an upside-down P-trap (if line is vertical coming up firewall, put in a 180-degree bend downwards so it vents towards ground).Got the engine back in a few nights ago. Had a little delay because the starter on the forklift went out and I had to replace it so I could pick up the engine. I ran in to a small problem. Like a dummy I didn't take good pictures of everything before I started taking two trucks apart and now I have a line I don't know where goes. It's the smaller of the two lines on the breather pipe that goes to the ground. I thought when I hooked everything up it would be really obvious but no luck. Any ideas?
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