Over the weedend I yarded out my motor to fix my oil leak, Rear Main Apone yarding it out I got to see thing a bit better. Cam and lifters and chain toast for . Pulled heads for just because pistons felt fine...Flipped it over pulled the pan, pull a few caps checked looked fine Oil pressure has all ways been good.. Next I make a attempt to remove the rear main seal.. Not happening. Start popping the pistons. First four looks good. now the other bank. OMG two pistons shot. Now pull the crank. some bearings were fine others not. Dangit is a shame tossing forged piston. So brought it to the shop Pulled the plugs while the parts were in the washer so got a bunch of clean part Tomorrow block gets washed sonic testing. heads parted. Finger out what we need Then do the 3 b's bore balance blue print...... 400 block has some oil improvements done got the 5/8 pick up tube.. Already Benn bored to a 436ci if my math is right. asked machinist about going 455 if needed for pistons... answer if it checks out good no problem.