OMC GM Small Block V8, 305/350 cu in, 1979-89 Exhaust Systems Products Mounting Kit, Manifold #766-244-MK $35.28 Mounting Kit, Riser #9863-MK $7.50 Gasket, Manifold to Riser #9863-G $6.00 Gasket, Cylinder Head to Manifold #101649 $7.75 Manifold, Port #2442 $255.00 Manifold, Starboard #2441 $255.00