been looking for an oversize doughnut, I bought an exhaust system from Waldron"s Antique Exhaust which fits great and the flange is made to fit a 216 or a 235 , And I did install a 235 .just did a search, but no luck. Just thought someone else might have played this game! I found a Walker:s but I don"t think will seal. Need one 1 3/4 ID by 2 1/2 OD . Any help much appreciated . Thanks