Spudders when it's hot..

ok so I double checked the timing and it's good. I drove it and still missing firing and skipping when under acceleration. I recently swapped the cap and rotor to MSD 8.5 wires and a Firecore HEI cap from Mancini Brothers. (link: Firecore - HEI Vacuum Advance Distributor Cap) I went with that cap because the wires I bought needed a male cap and mine was female. That cap is also described for vacuum advance dizzys which I don't have.

When I put my old cap and wires on the car runs fine, so it's something to do with the new cap and/or wires. Could it be the cap need a vacuum advance dizzy and will not work with mine?

The cap looks identical to my old cap except for the male instead of female wire top.

Anyone else running that cap?