Wilf - the motor didn't perform as I wanted it to. I tried to convince myself beforehand that I'd be happy with a genuine 800hp using a super conservative tune up. It turned out that we achieved that, but I still wasn't totally happy.
I stopped the spark jumping problems, but once we were able to comfortably rev the motor over 6000rpm it started stripping blower belts.... The belts are rated for a pulley speed of 8000rpm, and my blower pulley's spinning at near 20,000rpm
Nothing like trying to run a product above it's rated specs!!!
Anyway, running a rich air/fuel ratio of 11.8:1, only 18 degrees total timing and 6,000rpm - it made 805hp and 705 lb/ft. At 6,400rpm (just as the blower belt cried enough), it made 859hp and 704 lb/ft. There's more power in the timing for sure, but I'm planning on only running the 18 degrees timing with a 6,000rpm limit. At this rate, the motor should last for a long time and still make enough power to keep me occupied.