I have just bought a 20th anniversary with a blown motor . It would seem that it has run bearings . The engineering shop told me the bores where oval , although when I measured them they were not far out . Where do I find the bore and crank journal specs ? I want to build a " blue printed " standard motor . Using std pistons and rods ( ARP rod bolts ) and just get what is there optomised . I will balance the bottom end . Maybe lighten and polish the rods . Might see if there is any easy weight that can be removed from the flywheel . Any advice on building such a motor would be much appreciated . I want to keep it as original and std as I can . Anyone lighted std rods ?