So running through questions:
I believe the tank is steel, and will plan and move forward. If not, abandon course.
No CARB issues, but born and raised in Southern California until 23, I know real emission headaches. Here in tennessee, my county is obd2 check, so no codes, no issues + gas cap leak test + mirror check for catalytic. If I fail, I don't get my $12 refunded for the emission test, but can retest. Then I would pay my 75 dollar registration fees for the year... Some parts of CA I don't miss.
Back on track. I can pick up the rear 50 gallon and a regular tank at the same yard. Seems like the idea is that CAREFULLY with ENORMOUS PRECAUTIONS TAKEN, I could cut out the top of the gasser tank opening and weld the patch in to the old diesel tank.
While the diesel tank is open, remove any coatings?
Not trying to be lazy, but what are thoughts about coating over any original surfaces with something like red kote or a similar tank coating instead of stripping?