B body tank in A body
I have a B-body tank out of a ‘68 charger in my Duster, been a couple months now. I saw the same post as you, and I exchanged a few emails with that member. I’m still not sure what he did to make it fit, because having done it nothing short of major surgery will get it done and his description of what he did just won’t work.
I cut out the center of the rear crossmember, kicked it back almost 3”, and replaced it with a section of 14gauge I had bent up on a buddy’s brake to do it. I moved the triangular braces too, as they were also in the way. I actually swapped them side for side and welded them back on because it flipped the tabs out of the way of the tank. There’s no way to make that tank fit otherwise. With the tank moved back so it clears the diff the tank fill is pretty much in the right place, close enough to use the stock filler neck anyway.
As far as the tank sealer does, good luck. I’ve had very little long term success with tank sealers. My plan is to use an EFI tank in mine too, which is a big part of why I didn’t modify the tank even though my current tank is just an $80 stock replacement tank from Amazon. All those fine particle EFI fuel filters will not be a good combo with the sealer. Not from anything I’ve seen. The sealers work fine for awhile, then at some point the sealer fails and feeds itself into your fuel lines, filters, carb etc. All the additives in modern fuels don’t help, and the fact that they change those additives all the time now pretty much guarantees a sealer won’t be a long term solution. Even if it works great now couple years from now the fuel blend will change and that’ll be it.
The other reason I didn’t go after the tank is I wanted a 19 gallon tank. Or more specifically, I didn’t want to take a stock 16 gallon tank and then lose even more capacity with an in tank pump.
I have a B-body tank out of a ‘68 charger in my Duster, been a couple months now. I saw the same post as you, and I exchanged a few emails with that member. I’m still not sure what he did to make it fit, because having done it nothing short of major surgery will get it done and his description of what he did just won’t work.
I cut out the center of the rear crossmember, kicked it back almost 3”, and replaced it with a section of 14gauge I had bent up on a buddy’s brake to do it. I moved the triangular braces too, as they were also in the way. I actually swapped them side for side and welded them back on because it flipped the tabs out of the way of the tank. There’s no way to make that tank fit otherwise. With the tank moved back so it clears the diff the tank fill is pretty much in the right place, close enough to use the stock filler neck anyway.
As far as the tank sealer does, good luck. I’ve had very little long term success with tank sealers. My plan is to use an EFI tank in mine too, which is a big part of why I didn’t modify the tank even though my current tank is just an $80 stock replacement tank from Amazon. All those fine particle EFI fuel filters will not be a good combo with the sealer. Not from anything I’ve seen. The sealers work fine for awhile, then at some point the sealer fails and feeds itself into your fuel lines, filters, carb etc. All the additives in modern fuels don’t help, and the fact that they change those additives all the time now pretty much guarantees a sealer won’t be a long term solution. Even if it works great now couple years from now the fuel blend will change and that’ll be it.
The other reason I didn’t go after the tank is I wanted a 19 gallon tank. Or more specifically, I didn’t want to take a stock 16 gallon tank and then lose even more capacity with an in tank pump.
