Not usually big on aftermarket parts, but I wanted to use the M/T covers and looked dumb with stock air cleaner. I had to grind the flange down and JB an adapter in to make it fit, but works well. Sounds better at WOT to boot.
I shaved about 1/2" off the base with a belt sander. Then used a Mr. Gasket adapter which I used up the last 1/3+ of an industrial sized pack of JB Weld to set it in the base. I bought it on E-Bay and it had a Rausch return address on it. Very heavy cast aluminum.