Trying to remember from back when the last time I ran a FH there, but I think in the 17/65 range would be a safe start if nobody else responds. Hope this helps!
We won a lot of races at AMR in Flathead Heavy. Unless the track is junk, the gearing is 18-66. This will be a little low as the track is being run-in but come qualifying time.......it will be the gear.
