The MSD is for a late model Vortech is that what you are looking for?
https://www.msdperformance.com/products/distributors/distributor_accessories/parts/8017
yes that is it, the old style MSD vortec cap would fit my MSD distributor but the fire order on the cap was the same as a conventional cap. The correct a cap was made for the vortec but guys were using that cap for their MSD distributors to clean up the wires. Apparently there was another brand that beat MSD to the market but I haven't found those and I believe those are the ones my friend who owns a speed shop told me guys had alot of problems with them.