for street use like using the stock chevy oil pan pattern oem 2.750 mains and ... minimum thickness clearanced for 4.375 stroker crankshaft h-beam steel rods 9.800 ... expanded for better cooling standard chevy cam location and cam bearings priority ... stock spacing oem starter fuel pump and engine mounts blind tapped head bolt holes for ... lifter bores compatible with all chevy mark iv components stepped oiling 584 ... fit 2-bolt blocks with aftermarket cap kits now you have a choice between standard ... caps merlin iii cast iron big block chevy blocks bare part 081100 081110 081101 ... billet splayed billet 12 rev 2/07 engine blocks ...