My 49 3/4 tn longbed is an old San Joquin valley Frankenstein farm truck, so what is original on it is very difficult to determine. In 1977 or so I got a rebuilt from Verbecks, in L.A. It was supposed to be a 216 with a 235 head. It has the serial number GEA 104589. The block # is 3693374 head is 3886848, with 2valve coverbolts. I has an oil pump, no filter. The engine was a true beast. I may still have it rebuilt. Last year I installed a 55 235. I hope to be back on the road very soon. I am lost without KHardy. Ithiught I knew what I had, now I do not. Still fun.