904 Parts

It depends on what the HP and TQ level of the engine is. For anything under 400 hp you really only need a good rebuild kit that includes quality (Raybestos or equivalent) friction plates, new steel plates, a new front band (rear band is ok to re-use if it's in good condition), all new thrust washers and bushings, new pump gears or pump assy, sealing ring and paper kit, a multi spring conversion kit to replace the single wound spring in the front clutch, a 4.2 ratio front band lever, a billet rear servo piston, new rollers and springs for the sprague.

Above 400 HP I like to upgrade to either red lining or blue plate clutch frictions and front band. You might need some selective snap rings to properly set the clutch plate clearance. You also need to set the total end play so you might need a selection of different thickness end play thrust washers.