The distributor is a Speedmaster brand. I went with the small footprint distributor because the normal one with the coil in the cap didn’t fit. Apparently when my grandpa swapped the engine he set it back a little further and already had to hammer out the firewall and it would take some cutting to get any more room. The system has been converted to 12 volt and I took the resistor out of the line that goes to the coil when I put in the first HEI. Also, the distributor does not have a vacuum advance.

The link to the distributor I’m trying to use.
https://speedmaster79.com/Chevy-SBC-350-BBC-454-Race-Pro-Billet-Aluminum-Ready-To-Run-Clip-on-Cap