I dont know what you have done to that 727 but you better check the sprag and if you have a stock drum you really need to check it - if your broke it ( driveline shock will do it ) they become a grenade!
dont worry joe i all ready planed to tear the trans down. my car has a crt low band apply rmvb and a stock drum i will be chaging out when i has the transmission out. thinking about having the convert lossend some also.