The response that you have received about the steering rack and
fiberglass are harbingers of the just the beginning of the challenges that one
one attempts to construct a racecar that can run in current SCCA classes as
well as vintage classes. The compromises that needed to make a car eligible for
both will likely make it uncompetitive for both because you will end up
having to compromise at the lowest levels of performance modifications allowed
both rather than the highest.
Its my personal perspective that if you want to run SCCA competitively,
you need a car that is focused on their rules. Amongst Triumphs, a Spitfire is
probably a better choice than a TR3. If you look around, you probably find a
one that already has the fiberglass and modernization for a fraction of the
cost of building one from the ground up.
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