First time to post anything but have been searching this forum for a while to get good advice from some guys that seem to really know their stuff. Anyway, I have a b model 3406 I recently purchased in a w900 that I am tearing down to do an in frame on. Haven’t gotten any parts yet because I wanted to see what I had in the motor first due to mismatched parts that I have seen on the outside of the motor. It is a 7fb63388 short block with a round port (c model head I’m guessing) and a 7e5888…