a few ignition questions

[skata]

why is the ring around the pick-up coil in the distributor loose. does it affect anything?
when setting timing and the tan wire is unplugged, should the timing vary at all with an increase in engine revs?
is the msd coil worth getting?
what's better with the msd replacement distributor vs stock?

 

[bdubb]

how loose is it?
i dont belive it should
no, stocker is fine
and the stock one works fine.

 

[Typhoon #1133]

well, mine also increases when i rev it up. but not sure how it should be.