What is the websites I could go to rebuild 5speed trans in a 87 camero Z28? on 1990 Chevrolet Camaro

Im am in the process of trying to rebuild my 5 speed transmission the tail shaft is out of the transmission that is in it now. I'm wanting to know the websites i can go to find out information on how to rebuild? Thanks

Asked by for the 1990 Chevrolet Camaro
wow, there are a lot for automatic transmissions but not 5 speeds