I think there should be serious consideration of making Club Ford/Historic Ford a National Class run with the FF cars at the runoffs.
Regionals and especially Historic races have large fields across the country and if only a small percentage of those competitors chose to compete for a National Championship we would have a large and exciting field at the Runoffs.
The cars could run on the the bias ply slick or even the vintage tire that is only 2-4 seconds a lap slower than the slick.
Well prepared and reasonably driven cars would not be lapped and would not interfere with the FF race.