I'm in the process of purchasing a MC for my disc brake conversion on my 66 Skylark (It's an OEM setup from 71). Currently looking at the Tuff Stuff MC (https://www.tuffstuffperformance.co...k-powdercoat-2072nc.html?ref=category:1267383). There are both deep and shallow pushrod versions. My question is, did they use both in 66 on the single pot MC's? I'm not close to my car at the moment and was hoping to get this ordered. If most were one way or the other then it'll help me narrow it down. To clarify, I'm planning to use the existing (stock) 9" booster. Thanks!