quote:Is "cap walk" in a two bolt main engine at stressful RPMs a side to side or a fore and aft sliding movement?
Could it be restrained by, say, short hardened .250" dia. dowels fitted into holes drilled into the cap and block in lieu of four bolt caps? They could be positioned where the outer bolts of a four bolt cap would usually go and, being much smaller than a 3/8" bolt, would not compromise the two bolt caps(?)
That works and is about the only way to reinforce a 2-bolt Cleveland main cap, since there isn't enough meat on the outer ends to drill for the extra small bolts. FWIW, my Fontana aluminum race block uses two long 1/2" studs, two angled allen bolts AND two 1/4" dowels in each steel main cap, to harness 800+ bhp. These caps aren't easy to remove even with the crank out!