I did not see any change in the aluminum. I did not boil the ones I did but just poured the hot oil over them and let it sit.
Forgot about that, I'll post it and look it up, definitely odd, if I remember right, the guy I bought this 66 charger from threw it in the deal, cause he had no use at the timeIm curious about the holley single feed double pumper. What's the list number? Might be a valuable oem carb.