Well Fox Body I'm probably not the best person to explain this, but I will tell you what I know. 25.1c refers to the specification number assigned by SFI. To the best of my knowledge there is a 25.1c full tube chassis and a 25.1c backhalf chassis. Either one will allow you to go 7.49 or quicker. I'm real sure that Samuels car is 25.1c, but its a backhalf instead of a full tube chassis. The main difference is the front end suspension mounting points. The backhalved car is going to use a stock replacement type k member with coil overs. Anyone feel free to correct me.
andy
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88 coupe
91 LX NMRA Pure Street 5120
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