Ernie,
I never mentioned classes and I'm not refering to dirt track specifically, although it applies to that too. I'm saying brand is determined by architecture, regardless of how many parts are substituted, including the block.
NASCAR does not allow open-competition engines. It is very specific about what blocks, heads, carbs, etc. that it will allow. I could run a KB if I wanted to and it would be considered a Chrysler or a Chevy and I'd have to put it in a like body. Most sanctioning bodies want Fords in Fords, Chevys in Chevys, etc. because fans tend to be very brand loyal.
When rules, or I should say, lack of rules allows open-comp engines, architecture determines brand.
To say a Keith Black Chevy BB, a Keith Black Chrysler Hemi, and a Keith Black Chrysler Wedge are simply KB's, and dismiss the architecture, misses the point. For if that were not the point you guys would have to let me slide with my ProPowers and ignore the fact that they're Chevys and your not going to do that.
Carroll- awesome Ford, did you go with the 427ci/Dart combo?
Scott