If You want personal Customer care go with Greg Harrison (Livermore, CA) or Steve Casner (Sheridan, CA) for building Your Powerglide. Both are great guys and well known long time racers and You won't be disappointed. With either one You will not have transmission issues after delivery. Are You going to use the Reid case with the BB Mopar bellhousing or JW Ultrabell? How about a rear midplate? Bellhousing, crankshaft adapter flange(?), convertor and finally starter will be the challenge, not the Powerglide for 600 hp. IM me if You want Greg's phone #.