I believe the resonators are just going to restrict the exhaust even more.
Unless you just want it quieter? Less performance?

There is no reason to even mess w/the stock centrifugal advance springs, they are good for smog & passing lower emissions.

I would just throw in the aftermarket springs & do adjustments from that point.

You are just going to end up using those aftermarket springs & not even use the stock springs, the stock springs are too stiff.

They will not give you enough advance & the advance you will get will come in way too late.

Just trying to save you some time & not bother your wife. (unless she likes doing that type of stuff?)

Just my two cents.
http://temp.corvetteforum.net/c3/joeveto/Vacuum_Advance_and_Recurve.shtml

MBHD

12 port SDS EFI