In some books that I've read they use 93 octane from 10.5 compression only.
Try to run lower octane. And write me back at this e-mail and I will look in my performance books to see the correct timing.
Rick_Fireheart@hotmail.com
The crank was grounded .010 but did they put special thicker bearing?
If not your crank will not turn correctly because of too much clearance.

So write me back.
Rick