Have you talked to some W9 guys about the timing? The W9 combustion chamber might need different timing than what you expect. Not a lot of people with those heads so talk to right folks.

An engine dyno session would be informative but not really required. Lots of guys go down the track fast without having their engines on the dyno. If you can find a good chassis guy in your area it might make your journey shorter. It is easy to get lost when you're trying to sort out axle ratio, stall speed, air pressure, shock adjustments, chassis adjustments, etc. Sometimes just having an expert watch the launch is all you need to get going in the correct direction.