bro in law has a 92 stock heritage. have a ultima 6 speed for it is anything that needs to be changed or added with this swap? like trans pulley or compensating sprocket? I know the speedo will need calibration but wondering about trans sprocket or engine sprocket

 

You'll need to dismantle the primary chaincase, to do the swap, so there are going to be some gaskets and oil seals, plus tools. A factory service manual would be a good source of info, if you don't have one! Ultima publish the instructions on their website and include the tools required, including that factory manual!