cottonbranch racin on fb, makes them big enough to fit a 19 tooth, wraps around the top. check them out.
https://www.facebook.com/media/set/?set=a.108607549245638.10617.100002891815089&type=3
it was a popular conversion pre cp cylinder, very very heavy. hard to keep together, hard to find parts for, hard to keep a trans in a high strung one.