Christopher , I checked a new DOH kit and two Street Charger kits and they are all the same . I had to remove the alignment pins to assemble the halves of my engine block , and the rear is too long on the drivers side . It needs to be filed down till it is flush so that the rear plate and bellhousing will mount properly . In the two photos , the black engine block is the new DOH and the white primered one is an old DOH block . I know I did some sanding on the old one but it wasn't as bad as the new ones are . Just make sure the front is flush as shown so the cylinder heads and intake manifold will fit properly .