The 8.5 you speak of is the vacuum advance dash pot? I have 2 and they are both 11R's. I am beginning to think these things(distributors) only came with a 15 "top hat" and 11R dash pots.
I like this idea. The price is reasonable and simple to try. Without anyone having the old distributor machine around, I guess it's all trial and error. I know I can get a baseline from other members but in the end, each car and set-up will react differently.
