I have a 64 impala SS with a 250 HP 327. It is completely stock. I'm considering replacing the stock quadrajet with a higher performance Holley carburetor. I want to keep the stock air cleaner but the lower opening where it attaches to the carburetor is an inch larger in diameter. I'm looking for either some type of adapter or a larger base that I can still us the stock air cleaner cover. Any suggestions?