So I got stalled out in this thread at the car you built, I enjoyed seeing it, and it brought back a ton of memories. Rear engined flattie, body that looks a bit like a lakester. Nice. Lakesters were some of the first post-WWII LSR hot rods, body a drop tank from a P-38, tube frame, rear engined, early ones had flatheads like all other early 50's hot rods, later ones had big engines. Folks took them out to Muroc and El Mirage and Bonneville. Some folks also drag raced them, although that wasn't really what they were intended for. Here is a pic and write up of one of the most famous, https://silodrome.com/so-cal-speed-shop-special-belly-tank-racer/
(over-restored, if you ask me, it never looked that good on the salt or the dry lakes) and here is another one that may or may not be original, but has interesting background info in the writeup. https://bringatrailer.com/listing/1940s-bellytank-lakester-bellytank-lakester/
All lakesters are very similar mechanically, with basically two big layout option decisions -- 1. fold the driver up completely inside, with plexiglass windows forward (relatively rare), or have the driver's head sticking out of the bodywork (maybe covered, like the So-Cal car), which was much more common, and after the mid-50's backed with a stout roll bar -- and 2. rigid rear axle - no suspension--or home brewed swing arm suspension made from a Halibrand center section. By the way, not criticizing, but yours has noticeably very small frame rails, smaller than typical for these things, and no roll bar, not sure that would pass muster with SCTA but whatever.
I was at Bonneville as a kid with my Dad, in 1959, 1960, and 1961, and one of those years a couple guys from our hometown ran one with a blown, fuel burning 392 hemi. Went about 220 if I remember correctly. Unfortunately they couldn't resist the temptation of tipping the bottle too far, and kerblam, end of 392, and no record run. Another year they ran another period LSR hotrod, a chopped and streamlined 53 Studebaker fuel coupe with a blown fuel hemi in it, that went maybe a little closer to 230. (He went faster ayear later: "So lets go to Bonneville in â€˜62 to see what Lester captured for us. Listed in that years Program we find a John W. Edmunds entry. His car was a radically chopped Stude Coupe that was powered by a monster 455" Chrysler and was after the SanChez-Callahan-Lacosta record of 230.587 mph set in 1962. At the end of the week Johnâ€™s car was now known as the Edmunds-Cagle-Alpenfels entry and went home with a new Class A Comp Coupe record of 232.784 mph with Mr. Edmunds doing the shoeing. " https://ahrf.com/blogs/jims-news/posts/diggin-out-some-old-stuff
And flatheads, a closely related hot rod subject from the early 50's. My dad had a nearly 300 inch Merc (bored and stroked), Offy heads, Edelbrock manifold, 3 Stromberg 97's, "ported and relieved" (in the words of the Beach Boys in "Little Deuce Coupe"), and he had that engine in several different mid-50's hot rods. It made good power, but wow, did it run hot!! Sort of uncivilized and marginal, something like an 11-1/2:1 Triumph twin.
And of course, you can't talk lakesters, or early hot rods of any kind, without talking army surplus stores. Half the race parts on hot rods of the day were surplus airplane parts from that era--My dad and Ibuilt a couple race cars in the 60's that had B-24 seats, aircraft web safety belts, carb linkage with ball joints from surplus aircraft, surplus aluminum fuel tanks, etc. etc. I remember we spent a fair amount of time in surplus stores looking for parts, and since I was a kid I perhaps remember most clearly the strong disagreeable smell of military waterproofing and the huge random piles of stuff , but there were useable parts, jewels as it were, in those piles too. Anyway, your car triggered a ton of memories, thanks!