Quick scan of
http://gascityi69speedway.org/rules.html revealed the following
(Not in the Midgets tab under rules, just clicking Rules itself):
MIDGETS
Appearance
All cars shall appear and fit the guidelines of a traditional midget, such as all USAC National Midgets; for example-no bicycle tires on left front.
Weight
Minimum Weight - 1,050 Pounds (including driver) for cars using Fontana, Esslinger, Stanton, Gaerte, and other legal National Midgets. Midgets powered by Volkswagen, Honda, Ford Focus, and entirely stock production block and head
(such as Chevy II, etc.) - No Minimum Weight
Unfortunately, the first phrase appears to exclude chain-driven cars; not specifically, but "All cars shall appear and fit the guidelines of a traditional midget, such as all USAC National Midgets" could be interepreted that way, especially with no mention of motorcycle powerplants in the "non-National" category.
That's disappointing; after speaking with Mel last week I would have hoped that he would have seen fit to give us a try.
Oh well; one more night a week to prepare for Montpelier, which will clearly be my "home" track now...