Silver sport tranmissions
T56 Magnum Conversion
I cover the entire BOM on a conversion for a T56 magnum there. You don't have to buy a kit from one supplier - I'm not sure you will get everything you need from them anyway. I did buy a shift handle from them and they were good to deal with. You may want to look over the topic too since it may help with your install.
I bought my transmission, bellhousing, and hydraulic clutch conversion from
Home who was also good to deal with.