1100º f while babbit overlay is only 400º f thickness tolerancing is held 0001 ... mb5164hp description ford 302 width chevy diameter sbc 350 main set 1/2 groove ... sbc 400 main set 1/2 groove bbc 2.750 main set ... ford 289-302 main set full groove sbc 400 main set full groove bbc main set full ... for over or under-sized bearings enginekits apparel tech line 662-892-1500 283 ...