if cylinders above and below the siamesed joint For 5 good cooling water circulation and to relieve steam and air pockets it is necessary that these holes be matched with similar holes in the head gasket and cylinder heads 3 To prevent head gasket overhanging into the cylinder bore the production or other large bore head gasket A should be used The 4 l B bore bare block is available through Dealer Parts Departments l TWO BASIC POSSIBILITIES FOR CONSTRUCTING A 365 CID Ngjg l CHEAP g Xi Use a 4 bore block 350 CID 3 48 stroke crankshaft 350 CID forged pistons 030 0 SQ and small journal pre 1968 connecting rods Other d specialty rods could be used also a Block should be bored to 4 030 I V b Crankshaft should be reground for 3 9 l6 stroke and small journal 302 rods r c Cut piston tops to establish correct deck V i A ii I height or purchase connecting rods with I Q special length Q i d Remainder of parts common to previous special 2 high performance small block V S engines 2 BETTER Qg XPENSIVE Use a 4 l B bore block j 400 CID and have a special crank made from a forging to fit the large journal mains and rods of the 400 block 2 l rod journals and 3 4 I stroke a Obtain and use 4 l25 forged pistons L b Obtain and use specialty rods of correct Q length for pistons involved 7 c Use red composition cylinder head gaskets i i and drill steam holes in cylinder heads to V I i match holes in block V d Same as in d above iv fwa i A 5 ll l6 70 vg es T