"Stock" means as delivered by the factory. An engine swap is definitely NOT
stock, unless that very same engine was available on that very same chassis in
that very same model year (no up- or back-dating in stock), and any other
differences are also taken care of, like did they have different trannies,
different trim, A/C on one and not on another, etc.
The same-line rule applies to SP only, not Stock. In Stock, equipment has to be
as available in that model year.
Dixie Region Probe GT
Not at NATs, never been, may never go.