318 to 340 swap.

I just wrote up a post on this converter mismatch

http://www.forabodiesonly.com/mopar/showthread.php?t=182542,

everything else is pretty much garage tech. Few washers on the driver side 64-66 bracket. No 318 has the small convertor crank center ring, that changed in 67, the same year the LA 318 was introduced.