Sorry, my bad. Here are 64 and 72 cc models in straight plug design (easier to fit headers) that will take conventional intake manifolds. They're 180cc intake runners as opposed to the Vortec models with 170cc's and use 2.02/1.60 valves. Should do a great job on a street/strip 350 or mild 383.
http://www.summitracing.com/search/P...?keyword=heads