Raced the Cougar tonight (AGAIN... new times added 09/26)
Reply #25 –
You may not need flycut pistons...if it's not your daily driver, take the time and get yourself a little clay...check PTV clearance...if you got those heads off of an Explorer, you may want to mill them about .030" so you're not dropping compression.
FWIW, don't drop your rear tire pressure...I see so many people do it with street tires and it only makes matters worse 99% of the time. Use enough air to make a good balanced patch...light asphalt or concrete is the best test area...and air up those front tires to 45psi.
Good luck,
Don