LD340 Can’t Get The Carb Base To Seal

Back in 1999, now over 125,000 mile ago, I installed a rather large, life-time, metal-can, 3/8 in/out, EFI filter, at the back, that I scrounged from a parts-catalog; never touched it since. She went 93mph in the 660 with the mechanical pump sucking thru it just fine. At 3467 pounds and 900ft elevation, IIRC, the Wallace puts that at 433hp.
Therefore;
I find no fault with a rear-mounted suck-thru filter.

on another note;
I'm also not a fan of an electric fuelpump, that doesn't have sense enough to shut off, when the engine does, or if the line springs a leak upstream, or if I am unconscious, upside down, on fire, and sliding backwards at 300 mph; to paraphrase John Force.lol.
I haven't yet been upside down, nor to 300mph, but I have been in a car on fire, on the street, with no firesuit. If it has happened to you, you may recall how hard it was to fight panic. And in just a few seconds, gasoline can cause a lotta lotta damage. See how great a fire, such a tiny flame kindles.....