Like I said, the dist locked out isn’t problem to me.
If it runs good like that, just leave it.
That’s not you’re missing 1.5 seconds of ET.
If your flash stall is only 2800, that’s way shy of what would be optimum with a 505/292 mega cam(you’re sure it’s the 505?).
That’s a pretty good sized cam and I’d consider a typical 10”(35-3800)converter to be the minimum I’d want for that.
I assume the heads have the correct springs, and they’re set up at the correct heights for the cam?
As another reference point……
The Isky 505/292 cam is very similar to a Racer Brown SSH-44.
I ran an SSH-44 in one of my 440 combos into the low-11’s………with a 9” converter that flashed 48-4900.