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I recall someone saying if your engine dipstick was at the front on a 400 CI instead of on the side, then it was a car engine, not a truck.
Here is a picture of mine.
I believe the difference in dipstick location might only be between a 2wd (front sump pan) and a 4wd (rear sump pan). I could be wrong though. I'm yet to see a 335 series in a 2wd pickup, and that's pretty much what my motor looked like before I switched pans (motor came from a 76 Lincoln, my truck is a 79 4x4)
Are those heated air tubes on that air cleaner or what? If so, that's really cool, because that's what all those pretty chrome ones are lacking...
On my simple system, I have an electric shut off in the gas line, so I pull a cable and it shuts off the propane, and opens the gasoline valve to allow the gas to flow from the tank to the carb.
When I switch back, I push the cable back in and it shuts off the gasoline flow and opens up the flow of propane from the regulator to the carb and off I go.
It is best to switch at high speed, as the gas takes a bit to get up to the carb and fill the float bowl again, where as the propane flows almost right away and there is not much lag.
I can see the electronic cutoff in the pic. I might have to PM you some more about the system when I have a minute, if that's okay? I don't want to fill this thread up with off topic conversation. Cheers!
The oil dipstick and tube are different between 2WD & 4WD. 4WD's have a reverse sump. The dipsticks are also truck specific, and have a Ford ID number on them.
Even though the dipstick tube is on the passenger side on 2WD trucks, it's still a rear sump. You'll learn new words when changing oil.
If it's a 4X4 truck, it's incorrect.
I hear you on that one! My '77 F-150 2wd (R.I.P.), the oil drain plug was above the cross member, I made a "chute" out of a piece of sheet metal to direct the oil into the drain pan, always a mess.
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