Rescue / rehab project - minimal budget. Not a restoration project or a for-profit venture. WWII era survivor, last "refurbished" by the Red River Arsenal army depot in Texarkana, TX in May of 1952. Current head is casting#2136477 So I need a GMC inline 6 head for domed pistons. I am indifferent to the large or small intake/exhaust port sizes. (2136477 or 2193417)