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Similar to what Dyno said, the IHRA legal cars are able to run the local races, say BIR, RFR etc. I am not sure on National Opens, as that would fall more on the NHRA side of the house.

When it comes to the "rules", the timing system that these tracks operate on can't load in a crate motor class that may be an IHRA class. Most of the combos do fit in NHRA classes, I believe there are a handful of these cars that have joined us at MCR races in the past. You'd just have to identify which class your combo would fit into.

So long as short, yes those cars would be able to fit into those classes, just not the original designation you would use at TVD. Hope this helps.