TH-350 turbo short/long tail

does anyone know the different dimensions of a th-350 tubo short tail and a long tail... what i am doing is i took the long tail out and put a short tail in and i need to get my driveshaft extended the right distance... i know the dimensions are the same up until the tail... i just need to know what are the lengths of the long tail and the short tail so i get my driveshaft done right... thanks
nick

did you swap only the tails, or the transmisions
89 firebird? origianally with a 700 R 4 ?