why because the modified division for affordability decided to go to w GM spec engine 12:1 with Dart Iron Eagle 200cc heads that flow 262 cfm with a heavy bottom end. the old chevy rules allowed an OEM replacement World Product head that was nothing special at 10:1. they stated that the spec head would set the bar. that left all other engines as a dying breed. very few could afford to rebuild a new spec engine but it did add to the car counts. now that the field is healthy they threw that "set the bar" out the window and now allow the old 10:1 chevy rule engine to bolt on the Dart Iron Eagles too and run at 11:1. Now the Mopar is a whole different animal. you have an unlimited crank weight rule like the old chevy rule engines, lightweight rods and pistons, bigger stroke, bigger lifters and bigger Cu. In. the last Mopar to run in the old rules could of won every week. to slow that down when they approved the Dart Iron Eagles they allowed the Mopar to run the R/T head at 1.925 intake valve and force the mopar to run the M-1 dual plane intake and 10:1 vs the chevy Edelbrock performer 7101. Im not sure what kind of power we are looking at but ive seen HP no.s on the dart iron eagles between 400-450hp. im hoping with more low end torque and less rpm needed we can get this motor on the dyno and see where we are at.