In the middle of swapping fuel lines and tanks. I've seen all sorts of comments in threads about fuel tanks etc but here's what I found between my 93's on the front tanks. The diesel having a plastic front tank and the gasser crew having a steel front tank.
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Diesel/plastic tank heat shield. Has a upper shield that bolts to the side shield that protects the plastic tank. There is also (not pictured) a L shaped steel skid plate that doubles up the inboard side protection. The clean spots in the top lip of the side shield fore and aft are where it mounts. Heat shield bolts are also inboard to (face) the bed and tank, not fun to access and the side shield has 2 holes to bolt to the tank straps unlike the shield in the gasser crew with the steel front tank.
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Gasser/steel tank heat shield. No upper plate. What it there is attached on the bed to both trucks.
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Diesel/plastic tank front strap. Mounts to the frame and runs at a angle to the cross member by the rear of the cab.
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Gasser/steel tank front strap hooks into the crossmember by the rear of the cab instead of bolting to the frame like the diesel/plastic tank. (I didn't think about getting a pic of it with the tank in)
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About where the outboard front strap mounting hole should be but isn't on the gasser crew. The hole just before my finger is utilized by a wiring retainer on the diesel reg cab. Measuring from the rear rivet for the crossmember the hole needs to be like 6 5/8" ish and the hole present is not far enough back so there is no confusion that I have to drill another hole. Was a little surprised there wasn't a hole already there though.
Also found my rear diesel tank is a steel one, the crew was missing it's rear so can't really compare.
Plan is to transfer the fuel lines and selector with a section of lines far enough ahead to be able to extend them later so that the tanks can be re-installed and still have access to the lines that need lengthened. Had a little more fuel in that front tank then I remembered, just want to get it back in. Like ripping off a band aid I suppose, not fun just want to get it over with.
Not sure if this is a diesel/gasser thing or a plastic/steel thing as I don't know if some of the gassers had plastic tanks. Just some differences I found doing my swap between two same year trucks.