yeah, a TOD is a direct bolt-in for all 300s up to '86. '87 and up will need a bellhousing from an '86 or earlier. i prefer the TOD to the SROD because it's a top-mounted shifter, so shifts are more precise. other than that, they are the same. the casting code is RTS on the TOD, and RUG on the SROD. you might also find them referred to as the Tremec T170FT (TOD) and T170FS (SROD). hope that helps!