CNC Dude: Here we go. The bolts are 3/8" and the exhaust and intake ports are both 1.20" could be 1.25" haven't got the head dipped and cleaned yet. There are gaskets for my 248" at NAPA, FelPro fpg-ms2498b also the gaskets that came off were Victor 12159 on both ends and a 9622 in the middle. The spacing between the each gasket was 3/4". I Could make copies of the gaskets that came off the head and send them to you or send a set of new gaskets. Norm
