I think it's a FFR MkII chassis with a 289 FIA body from "Grumpy" (screen name here on forum) out of Texas. Apparently he makes replacement 289 and 427 bodies that fit the FFR. The chassis looks to be at least modified to have the forward braced roll bar.
I've posted before and tried to inquire as to what parts Grumpy makes but can never seem to get any information.
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