NHRA stock classes- does anyone understand this stuff?

Hey All:

I was looking through the rules for the NHRA stock classes and I can't make heads or tails of it.

If, say, you wanted to race a 66 427 Fairlane, does that mean you'd have to start with an actual R code car, or could you dump a 427 into a 289 car?

Also, would you actually have to find a $$$ side oiler block, or could you use any FE block that would take the correct rotating assembly?

Also, could you run a K-code 289 in a 66 fairlane, even though that engine wasn't offered in the Fairlane that year (but it was offered in the Mustang).

Its interesting but weird. Its like they're trying to exclude people by make the rules super intricate and hard to decipher.

Any help is appreciated.

Steve

You can build a "clone car" of the car to be represented. So yes, you can use an ordinary 289 car, and build it like a 427 car. You do not have to start with an actual 427 car.

There are certain car/engine combo's that are favorable, or more competitive.

You can use another FE block asa long as the bore size and stroke do not go "out of bounds" from the NHRA acceptable limits.
After all, the cross bolts and side oil galleys dont make it any faster, just stronger.

You could run a K code small block also if you can prove that any were made. I'd be willing to bet that there were indeed a handful of Fairlanes built in 66 with a K code, but they would also be rare and few.