Highboy Rear Fuel Tanks
#46
The steel tank has the potential to rust from the inside out In a northern winter climate when the tank is not full .. poly is the way to go IMHO .. Rust flakes/particles in the tank are hard to get rid of and involves a lot of work to diagnose a fuel obstruction problem because of the work involved in dropping the tank ..
#49
Ya Doug, it does look like Aerotank changed up their design according to their drawing. It would make sense that mine was meant for a 4 inch frame rail because if made for 6", that would have made all the difference in the world. So based on the drawing, you should have no trouble with the tank. On a side note, I didn't realize there was a difference is height of frame rails between the earlier highboys and the 73-77.
So far I have really only test fit the tank, but everything seems to line up correctly. The modifications I was speculating regarding 4 or 6 inch frame selection seems to be correct. On my install the filler tube clears with no issue. I don't have a good picture due to the fact that the bed is installed, but it fit fine.
#52
#53
Like Doug, I also recently ordered a tank. The drawing has been updated, so all should be well, but my filler neck is just barely too low. After measuring, I found that the rear mounting tabs are 1/2" too high (6 1/4" from the top instead of the 6 1/2" in the drawing). Also, the front tabs are at the wrong angle compared to the frame. My tank must have been built on a Friday afternoon. Anyway, I am still working on the fit, so I do not have the final solution and accompanying pictures.
I also noticed that the tank seems best aligned when the rear tabs are set against the rivets for the cross member. Doug, is that how you have yours aligned and why you have the spacers between the rear tabs and the frame?
I also noticed that the tank seems best aligned when the rear tabs are set against the rivets for the cross member. Doug, is that how you have yours aligned and why you have the spacers between the rear tabs and the frame?
#55
#56
#57
#58
If I were to do it again, I would order the tank without the four mounting brackets attached. That way I could position the tank exactly where I wanted it and then weld the brackets into place. That is what I ended up doing, but having the brackets shipped separately would have saved me the time of having to cut all four of them off.
9thPony is the only person I have heard of that has received the tank and has had no problem with the bracket location. I specified the 6" frame and the brackets were still wrong. The tank is well made, otherwise.
9thPony is the only person I have heard of that has received the tank and has had no problem with the bracket location. I specified the 6" frame and the brackets were still wrong. The tank is well made, otherwise.
#59
I'll keep that in mind for the brackets. I'd rather get that tank as high as possible too.
#60
D3TZ-9080-A .. Fuel Tank Filler Cover-Approx 4" round (steel) / Use to cover hole when mid-ship fuel tank isn't used.
1973/76 F250 4WD Regular & Crew Cabs / 4 available NOS unless you include the 22 that Collectors claim they have.
PA74F250: 1973/76 Styleside Beds have exposed fuel caps, 1977/79's have fuel doors.
33 1/2" distance between the inner frame rails behind the cab: 1973/77 F250 4WD (High Boys) / 1973/79 F350 Cab & Chassis / 1973/79 F350's on the 140" wheelbase.
All other 1973/79 F100/350's have 37 1/2" rear frame rails.
1973/76 F250 4WD Regular & Crew Cabs / 4 available NOS unless you include the 22 that Collectors claim they have.
PA74F250: 1973/76 Styleside Beds have exposed fuel caps, 1977/79's have fuel doors.
33 1/2" distance between the inner frame rails behind the cab: 1973/77 F250 4WD (High Boys) / 1973/79 F350 Cab & Chassis / 1973/79 F350's on the 140" wheelbase.
All other 1973/79 F100/350's have 37 1/2" rear frame rails.