the rules are based on older DIRT engine rules.
limited to 358 inches, must use a holley 500cfm 2bbl carb, no limits on compression, must use a DIRT stamped intake(it is just an off the shelf dart intake really), and there is a very very short list of heads that can be used.
dart IE 180's are the hot ticket right now, old style bow ties are legal but not good enough anymore, and you can run vortecs but you are limited to 9:1 if you do.
officially there is no porting, gasket matching, or other machine work allowed to the head casting itself. in reality a winning set of heads will cost in excess of $4k pretty easily, that is on top of the pruchase price of bare heads.
you are allowed to run any cam you want, it jsut can't have any kind of roller tappet.
the bottom end is pretty straight forward, based around stock stuff mostly. SBC's can only use 5.7 steel rods and very very few aftermarket cranks are appoved for use.
the guys with all the top shelf **** wil routinely spend 20-25k on a motor to give you an idea of what we are up against. you can prolly tell that this is a big budget cheaters paradise. someday we hope to join them.
