I use this setup on an Eastwood leveler. The bolts are 1/2-12 x 5, the spacers are old 1/2 drive sockets. Using the head bolt torque sequence: the bolts with the spacers go in the #7 and #8 holes (on the intake side)and the bolts with the 1/2 SAE washers go in the #9 and #11 holes (on the distributor side). Very easy to tilt or level the engine with this rig.

http://s858.photobucket.com/albums/...&current=P1010151-1.jpg&newest=1

Joe D.