Tremec to c6?

Same as any other auto trans swap, a flexplate, block plate and starter that match and mate with the torque converter, a vacuum line to the modulator, a kickdown linkage, a shifter and linkage, trans cooler lines and a cooler or rad with a cooler, the right speedometer gear and cable, neutral safety switch and backup lite wiring, and a crossmember. I think C6's have a different output shaft than a C4, AOD or T5, and maybe a different length driveshaft.