one of my friends told me that they are using a .065 hole in the restrictor and said they are still getting too much oil.. what sizes are you guys using ?? ..Thanks guys for the great info and pics.. i will take care of that so as my car comes back from chassis shop.. Headers are being built.. *************** BONEFISH to answer your question here is what the 572ci Indy is going in..63 Dart that i have been building for the past 1 1/2 years..