Hi David,
I am a Tremec "ELITE" distributor. I sell every part needed to install a TKO-600 behind your 428 PI. Is it still a stock 428 with external balance? The Quick Time bellhousing & clutch assembly and all hardware is in stock.
I would not use a hydraulic throw out bearing. I have developed and marketed an external slave kit and fork kit that will not leak like many hydraulic throw bearings do. I do have many dealers that install & sell these and are very happy. It looks like a complete kit will be $3800.00 complete with
oil, yoke, Quick Time, Ram clutch kit & external hydraulic slave kit.
I offer FREE SHIPPING on kit orders.
I am available nites & weekends on my cell phone for tech help so you can always talk with me.
Call me with any questions,