This is a manifold for an early Chris Craft with a small block Chevy Engine. Port & Starboard are the same. The Port Exhaust Riser is BARCC-20-08288, and the Starboard Exhaust Riser is BARCC-20-08289BARCC-20-08289. The manifold mounting kit is OSC7056-MK. Osco Manifolds and Risers come with a 3-year warranty (PDF)!
Log Style Manifold Assembly. Fits GM V8 283 / 305 / 307 /327 / 350 / 400 cu.in. engines. Includes OSCBW Front Plate for 1/2" pipe fittings and OSCBE End Plate for 2-1/2" threaded, (2) OSCBG End Plate Gaskets, and manifold mounting hardware. Osco Manifolds and Risers come with a 3-year warranty (PDF)!