I'm searching for a pair of unmodified, not corroded, Primary Throttle Plates for a D0ZF-9510-Z, List 4653 Holley carburetor for a 1970 BOSS 302. They are Holley number 9R-224 and will have the 224 stamped right above the 0.103" diameter hole in the throttle plate.
What have you got?
John