Gas tank help

[61Cadman]

Hey guys, I'm new to the forum and just picked up a 1972 blazer that used to be 4x4 and is now 2WD. The gas tank seems to hang low. I would like to go lower in the rear, however I'm concerned about how low the tank hangs down. It looks to be a polyurethane tank. How low did the factory tank sit? Is there a company that makes tanks that sit up higher and still hold the right amount of fuel?

Thanks for any input. I will get pictures posted once I learn how.
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