Fuel system or carb is where I would start. Namely the bleeds.....

Dealership. Ignore those meaningless "not responsible" signs they put up. If they take care, custody, and control of your vehicle, and they damage it in the process, they are liable.

TOTALLY AGREE!!!

I used to put baseball cards and playing cards into the spokes of my Stingray bike but I was 10 years old, so I think I had an excuse

I like and use a 6.700 and 6.800 long H or I beam rods in all my low deck stroker motors

Another FYI: the fuse box clips can be a source of intermittent connections if they are corroded at all. The glass fuses themselves can be bad, but appear visibly good as well
you didn't mention what car it's in but they all should have a strap supporting the back of the radio. This is where it should get its ground from as well as support the weight of the unit

keep us posted

I think about fuel volume being determine by the inside diameter of every part of the fuel supply plumbing from the pickup in the fuel tank to carb needle and seat diameter.
The smallest passage is the limiter to the volume
I messed up when I built my pump gas duster, I installed a 10 micron fuel filter between the stock gas tank welded on sump and the 275 Magna fuel electric fuel pump fed by a #12 line to the pump and feeding a # 10 line to the front of the car to a 100 micron fuel filter. I had a Innovate LM1 wide ban on the car and had jetted up the stock type six pack and it made no difference on the wide ban readings or the spark plugs appearances.
I have seen similar results when having the needles and seats to small or the fuel line I.D. to small.
You know there is a fuel supply, volume, problem
Now comes the hard part figuring out exactly what or where it is You can do this

I called at the end of last year about a digital 6+ and they told me as long as the date code on the back was, I believe no further back than 2015 they could fix it.

Your comment points to the fact that percentage of cylinder fill is not constant, nor is rpm and lord knows, how many other variables. So the fastest way down the track might be a G sensor, combined with a program to seek the best timing repeatedly, like every .01 seconds? I bet someone out there is doing it. If I can think of it, i am certain many others have. ProStock class comes to mind

The only thing in my GTS covered with custom material is the seats. Everything else is the correct color. Yeah...That Challenger interiors is waaay overdone!

I used a Trickflow on mine and it works really well!

I’ve got several roller cam blanks from the late 70’s early 80’s bought from Direct Connection. They are unground lobes. I sent one off to Bullet and they confirmed they were Enderol blanks. They are a harder core than a standard flat tappet but you can use a regular oil pump drive gear and not the brass gear that wears out. They think they would work great for a mild or street roller application. I’ve got some old Hemi cams from the same time that are not billet that have the same markings. Anyone have any experience with this?

I wouldn't waste my time on trying to make that smog carb work well on your car
Find a better, older, pre 1976 or one of the original HP carbs

He still has the cometic banner on his page. Looks like mostly selling Ignition stuff. Give him a call. 541-942-5920