E85 in 90's factory fuel tank

hi, I hope this is the correct location, please move/advise if not. There is a lot of information on the internet and I'm having a hard time discerning what is the correct course of action here.

I am planning on retrofitting a 90's toyota fuel system to run e85. I already have off the shelf aftermarket e85-compliant fuel rail, fpr, injectors, etc. I plan on moving to 8AN feed and 6AN returns lines, all PTFE. I intend to pull my fuel tank and clean/epoxy coat it with POR-15 Fuel Tank Repair part # 49239. I called them and they verified it's e85 compliant.

My question is specifically around the fuel pump hanger. I intend to run a Walbro 450LPH pump which really needs bigger gauge wiring than factory and a bigger feed line. I have a spare fuel pump hanger/bracket that I've started to chop up, plug weld, etc in order to install bulkhead fittings in their proper place. In looking at it though, the hanger is zinc coated and the internet says that isn't safe for e85. I can get it sandblasted in order to remove the zinc, but I should still apply some coating to the fuel pump hanger in order to protect it against e85, right? It's bare steel under there. Can I use that same epoxy coat from the POR-15 coat or will the fuel pump vibrate it away? What should I use?

Am I overthinking this? Do non-fuel cell people just normally use the factory fuel hanger and call it good? I could still get the zinc coating blasted off and run the bare mild steel hanger and drain the tank every winter... But that's far from my preference since any water separation could create rust.

it looks like high Phosphorus Nickel plating is the answer. The trick is to isolate or limit contact between treated surfaces and Aluminum fittings due to potential galvanic reactions. I am considering masking the top part of the fuel hanger where the AN fittings will connect and doubling up with PTFE washers.

I don't think you're overthinking things. I think that most people don't know what they don't know and start converting to E85 without thought about whats actually in the tank. Fact is, I tell anyone who wants to convert that they should drop their tank completely, have it inspected/serviced/repaired and if I don't know enough about the platform I suggest moving to a compliant hanger setup. It's certainly belts and suspenders but I don't get the complaints of 'E85 sludge' or other odd failures down the line from people that consult with me like I've heard and seen other people have.

Thank you for the feedback David. I would absolutely prefer to just buy an off-the-shelf anodized fuel pump hanger but it just doesn't exist for the Celica Alltrac/GtFour. I do imagine I'm not the only one in the world though running an oddity platform that doesn't have 2jz/RB levels of support though:) I'll keep updating this thread as I learn things and maybe it can help someone else out in the future.

In case anyone is wondering, I am going with flexible PTFE fuel lines under the car since I had a hard time finding hard anodized Aluminum lines and 8AN stainless lines sounded difficult to properly bend without kinks or expensive tooling.

I've been mixing ethanol with racing fuel making E66 and E85 and that mix reacts with aluminum resultingbin clogged fuel injectors despite having 6 microns filter in the fuel line. Tried anodizing it- didn't help... Ended up with installing stainless steel fuel tank.