I understand the confusion all too well, and ended up deciding that I am building my car around the PSMCD rules;
Factory Stock/Pure stock = NHRA; their rules are printed and have some flexibiilty for cars never factory built (eg: 1970 RAIV Formula 400)
F.A.S.T. = in my book this one is essentailly a 'stock appearing' race where the deeper your pockets, the faster you go.; F.A.S.T. = Factory Appearing, Stock Tire; if it isn't seen or if it looks stock, you're good to go.
PSMCD = the group with the most stringent rules, and in my interpretation has the potential to be the funnest of the lot. It's all about your car, and essentially comes down to the hp/weight along with the driver.
The camshaft rule change has lessened, or almost eliminated my search for a good 067 cam for my car - I didn't want to go with the replacement, which is essentially a 066 cam, and the few 067 cams out there are not cheap. I had one gent here offer me an NOS one, but at the time I declined the offer.
This rule, as I see it should permit me to use a readily available 068 cam - this has no extra lift, but does have more duration, but may be a financially feasible step-in replacement camshaft.
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1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.
1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
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