Topic: exhaust collar woes

[octagon]

i'm trying to put a rc engineering exhaust on my 76 750k. the headers are set up to use split collars, which i have, but they are about 1 15/32 inside diameter, and the outside diameter of the headers is more like 1 17/32. anybody else run into this by any chance? these collars came off a 77 hondamatic.
also have a junk set of headers with k type ends but would like to avoid cutting and welding. 

[octagon]

ps this is what i'm working with also:
http://forums.sohc4.net/index.php?topic=70360.0
will post a wanted ad for some mac collars - any other ideas?

[octagon]

another ps - also contacted mac by email - they say they get back to you within 72 hours

[754]

 some muffler shops may be able to make them.
 Can also be machined, then split... too bad you are not near me..

[octagon]

maybe the mac people have them - other thought was to grind down the inside of the stock collars. this would leave larger gap at the splits though. i wonder about doing that anyway and adding a washer to bridge the gaps. probably there are shims out there that would work as washers.