thx reaper, with its casting date, trying to figure out what it was produced for? the only thing which remotley sounds plausable is the artical in the AMC mag iss 30 pg 28 titled 'X Marks the Brock Spot'.L34 Head. That style was the performance version right up to the Brock "B" cast items of the mid 80's. Prob the 2nd best of the early style heads behind the "B" cast. VN type whips them all. VN "D" ports are the best stock head you will get.