Tom,
how much timing are you running now?
And, how little were you running before?
The only problem with setting say 4,6,8,etc,,, degrees of timing pulled from your knock sensor,it retards all the cylinders ,therefore really killing your power,,,,but it's better to be safe!!
Goodluck @ the next rack visit!!!
I'll just say it again,try some methanol injection,,,,you will be really surprized how much total timing you can go with!!!
From what info I have gathered this Alky inj ,works good & has great product support.
Julio is the owner I believe?
http://www.alkycontrol.com/?ref=turbobuick MBHD
