I got the same issue. MSD should make different sets of bushings.
Don at FBO has some bushings. Who did you find that makes them? Can you post a link? I would like to have all 3 of the ones you found as part of my tuning kit.
YES it will help, the stink should go away... More initial will have your engine talking to you when you start tuning the carb. It will tell you what it needs.. You just need to listen!
Remember Timing first, then tune on the carb!
See here ...
http://4secondsflat.com/MSD Distributor Tuning.htm