No problem Tig. You can use the MSD cap-a-dapt to fit the large ford distributor cap onto your existing distributor. If it will clear your cylinder head and valve cover. The belt drive deal is probably better, but the cap-a-dapt deal would be a lot cheaper. In my case, the big ford cap won't clear my valve cover. I know I can pull at least 14° w/o any phasing issues w/ the small cap. If I run into issues later, I'll take some base timing out.