Not sure what model# your MSD distributor is, but if it is the 8350, this should help.
"
Hello,
is there a ignition module replacement for MSD distributor for MSD 8350.
Otherwise ,how can i repair my MSD 8350.
best regards
Asked by MICHEL on March 22, 2019
Michel, the ASY19970 is the correct module for your 8350 distributor. We recommend sending the distributor to MSD for the module replacement. Please contact our Tech Support at 1-888-258-3835.
MSD Ignition Answer - March 27, 2019"
This was pasted from the question section from Summit Racing for ASY19970. Summit do not show this part listed as fitting 8350 though.