While your tank is out, consider doing the "harpoon" and other modifications to improve the venting and usable capacity, if not already done. The TF46 van tank typically has ~41 gals usable since it does not fill the top ~10% of the tank due to venting restrictions.
Lots of threads here on SMBforum re: TF tank issues, mods.
As REF suggested, drain the tank as much as possible before removing. Running the heater fuel pickup tube to within an 1/8 - 1/4" of the bottom of the tank is absolutely the right call.
The TF46 tank is a proprietary design shared by Quadvan and SMB. I doubt the pickup snd van tanks are the same.
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Ray
Beastie 3: 2002 7.3 EB Cargo: Agile TTB, CCV High Top, Custom Walk Through, Lots of stuff added. www.BlingMyRig.com
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