Ross, it is 511 cubes, 4.310" bore Pond cast iron block, 4.375" stroke RPM forged crank, Crower billet rods, CP 13:1 pistons, and the cam is a solid roller, .880" gross lift, 285/292 @ .050 duration. Crower solid roller lifters. It has a Milodon 8 quart pan, a Moroso windage tray, and a Precision Oil Pumps high volume pump. It is nearly identical to the 504" version that I tested all the 351C intakes on, except for the cam and pistons.