There are no unknowns in this equation. Original tanks fit with a bit of a struggle.
Original tanks are not so easy to find.
Drake tanks do not fit with body installed.
after installing the Drake tank, you have knowingly created another serious problem.
The correct K -S fuel sender will not fit.
A sender that does fits the Drake tank will never work correctly with the original gauge (well known fact)
Fix the old tank. May be hard but possibly a good option
Find a used tank. They are out there. Try the old Ford stores that have used parts. I have found them there. Best option in my opinion.
This is not as simple as removing an old failed part and installing a new part and going on your merry way. You are walking into known serious problems and spending a bunch of money and effort to do so.
This is where the good old swap meets paid off. You could find this stuff.
I have original tanks in my '40 and '32 for obvious reasons.