572 RB Street motor advice?

@beepbeep46
Here's the last thing I'll post unless you or anyone else has any questions.
This is my "overly detailed but hey, I can't help myself" signature that covers a lot of the details of parts and systems in my 70 Roadrunner.
I will thank God when I find the time and a few $20 bills on the same Wednesday and a friend or 2 bring their cars to run the 1320 with me again. My "luck" is so bad, my 440 6bbl ran like a fine clock for 5 years or so, but when I REALLY wanted to get some use of it at the week of Cruisin the Coast October 2nd through the 8th, well...Tuesday night my wife and I set out in the Roadrunner for the Flamethrower Contest in Gulfport, we like watching that (she really likes it) and I wasn't more than a block or 2 away and knew something was wrong. Gasoline smell, rough, stumbling, poo-poo!! Long story short, I have a few fouled plugs that aren't firing properly. Too much to do once Cruisin the Coast is happening, with my wife's 421 Tripower GTO having taken up several days before the event, NOT knowing I had a problem with the 440, so only a day Wednesday to troubleshoot. Ignition system gone through, cleaned, silicone treated, that wasn't it. Check floats, adjusted 1 that was a little high, no bueno, so we took the GTO out together and I only brought the Roadrunner to Mopars In Da Bay on Thursday because it's a MOPAR event and my friends and acquaintances are always there.
So to finally get to the point, my #3 plug that's probably the most difficult one to access won't thread back in, and I may likely have to get a reverse thread chaser before I can get that new plug in. I'll do the other ones I haven't changed out yet, and that should get me by fine until the 572 goes in, hopefully by September 2023.
Best of luck to you and I look forward to YOUR experiences with the setup, because finding someone who builds a 572 for mostly street use, well that's not very common and we should be very helpful to each other!
Here's "the list" of my current setup. I will bold a couple of uncommon or very important items you may want to think about for yourself that I have that I believe will be VERY important to make the 572 work to its greatest potential as a system component.
1970 V-Code Roadrunner. 71 440, "6 pack" crank and rods, 292°/.509 Purple Stripe cam, CompCams flat tappet hyd. lifters, springs, 10° locks and retainers. 1 7/8" ceramic coated TTi headers w/Doug's 3"electronic cutouts, 4.10 Dana 60, Strange diff cover, Passon Performance a855 5 speed, Viking B-202 Double adjustable front, B517HF XS Triple adjustable rear shocks, Wraptor serpentine belt and accessory system, Vintage Air A/C, Borgeson Power Steering, Hydramax T.O. bearing conversion, HitMaster launch control, McLeod RXT dual disc clutch, Calvert split mono leaf springs and sliders, Assassin traction bars, Dakota Digital gauges, Strange Engineering chromoly driveshaft and yokes, 1350 U-Joints, Wilwood 4 wheel 6 piston caliper disc brakes, Line lock, Cold Case radiator, Mancini Racing driveshaft loop, US Car Tools subframe connectors, front and rear torque boxes. QA1 K-member and front suspension w/SPC UCAs. FBO ignition system, aluminum 6bbl intake and Promax modded Holley carbs, Promax upper and lower stainless braided fuel lines, Carter M6903 mech fuel pump, Innovate Motorsports dual wideband O2 system, Blue Thunder console, Scat Procar bucket seats.