I have received several requests for an adapter that will mate with a GM 5 1/8" diameter bore bell housing. These bell housings came on some '67-'68 Chevy trucks will 4 speeds. Also, some large GM trucks with big blocks had aluminum versions of the similar bell housing. Other than the 5 1/8" register only on the bell housing side, this is identical to the standard adapter. It is meant for use with '83-'93 S10 T-5 5 speed transmissions.
Price: $159.50 plus shipping
If shipping out of the US, please contact me.