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Without wings you can take any 305 rules package motor, one of 5 different crate motors, a sealed shwanke 5.3L EFI motor, a 2 barrel 360 motor, and have good competitive racing with nobody being at a real advantage or disadvantage.
When you take a car with shocks and tires designed for 800-900HP and add a wing designed for cars with 900HP you have to start making sure all the motors are dang near identical. A little extra power really shows up in a class of vehicles where everybody is so under powered to begin with.
Until they invent and implement a wing that is purely decorative that has little or no downforce or rudder affect any winged econo sprint class will have to be running on one standard engine package. And the crate motors still allow massive dollars to bump up the HP. Lots of the crate latemodel guys sell used engines for double the price of a brand new one because they have gone to a certified rebuilder/sealer and gotten every bit of tolerance and balance pushed to the max. And soon somebody will invent a crate sprint specific intake package that will kick the crap out of a 750 holley or an old hilborn injector and guys without it will pretty much be forced to buy it.
But going back to my first comment... get rid of all the downforce and rudder and you can combine 20 different econo sprint engine packages and have great racing.
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