[ByronRACE]

I'm going to go outside the box slightly, having seen your car and situation.

What I would do would be to put a service hatch on the top of your tank (and in your trunk floor) and build the solution into that, and I'd use a completely different pump solution to drop the fuel heating problem down significantly.

A single Walbro GSS342 pump can support 500rwhp and is tiny by comparison to the A1000. If you're making more than 500rwhp, then use two. They are OEM quality pumps, last a long time, and will be silent compared to your exhaust note. They also don't heat the fuel as much and when they fail, they don't fail in such a way that it slowly leans out your mixture...when these gerotor pumps die, they just die completely most of the time. That is, if they *ever* die. I've seen them go 100k+ miles routinely.

The pickup screen/filter is part of the pump. All you need is a hangar to hold it near the tank floor, a baffled area to keep fuel to it at all times (perhaps with ball-check valves or trap doors), and a feed-thru for +12 and gnd to power them.

The baffle/box area can be built into the hangar such that it's resting on the trunk floor when the unit is bolted into place. To bolt the fill plate in place, you can use rivet nuts on your existing tank. If you make your fill plate a standard stock car size you can use the existing gaskets that are available to seal it. If the material on the tank is too small, you may need to make a nut plate (backing plate) that you could thread instead of using rivet nuts. You could bond that into position, or use a couple small flat-heads to hold it in position.

You want the pumps in the center of the tank, if possible (the corners slosh dry more often), and the baffled area as tall as practical, and enough volume to supply during transients (a pint, or more). You can hold the pumps in with hose clamps; the hangars need not be fancy.

That's what I'd do. No ground clearance issues. No need to weld on the tank. Cooler fuel. Cooler pumps. Longer service intervals.

Then, once it's working, you could add a pump controller that raises pump voltage with engine rpm and run the pumps on 6-15V depending on demand. That will also reduce heat and extend service life.

And, ebaying the A1000 will pay for all of the hard parts most likely.

Byron