Should of replaced block when rebuilt. Heard of weard "very few" cracks on oil gallery. Manaflux cold not pic'm up. This is worst case. Im running ford 550hp creat eng with 150hp nit. High vol. pump 10 qt. oil pan. Pressure allways pegged on sw 80 psi gauge. Also made own thermastat adjustable bypass valve. Runs 160 crus. 180 @ idle.