Only runs 40 Degrees advanced

"Dot to dot" is not TDC. It is 180 out, or TDC for #6. TDC for #1 is cam gear dot at 12 and crank gear at 12. So you need to make SURE your distributor is in correctly. Also, have you run a compression test?

Even still, WITHOUT USING A PISTON STOP, you do not know "where you are". Ask me how I know.
I agree I say dot to dot because that is how the manual tells you to line it up. If both darts are at 12 o’clock then it is top dead center for number one. If the darts are at 12 and six then it is at top dead center for cylinder six that is very confusing but I learned that the hard way a few years back. I am thinking eyeballing the top side of number one piston and top dead center on the timing cover and balancer can’t be no more than a couple of degrees out and this problem appears to be 30 or 40° out. If it was possible I would say that Cam is twisted but we all know that’s impossible it would just break like a piece of hard candy