Anyone put a fuel cell in a 64-66 Cuda? Bad idea? Fumes?

Hello all,
I need a new fuel tank and am going efi. Thinking about putting a 15 gal fuel cell in the trunk of a 64 Cuda. Bad idea?
-I would build a firewall but still concerned I would be chasing fume issues.
-Want to cut a hole in the cell for a stock magnum efi pump (which includes regulator and plug and play with my stock efi)
-Other option is Tanks Inc efi tank, pump, regulator.

If you have had luck with a cell in the 1st gen Cuda or similar, please let me know!

no diff from a cell in any trunk, "vent to the outside!" I would seal the divider anyway. Only sealed battery beside it if it`s in the trunk too, or you should use a sealed battery box. I prefer a sealed battery back there anyway .