twin port outlet cast iron manifold yes were on the gx and were usud with twin carb set up we are chassing every bit of power we can get out of our 1200 m2 block but the big problem is we have to build the engine to set rules!!!!
makes it hard as we canot run double valve springs or extractors so we have adapted other springs in but still have valve bounce we need to increse all strenghs of engine as we have a australian invasion coming to tassie next year and be damed if i am going to give in to those dame charades.l