I have had a fresh rebuilt 235 leak oil between the head and the block. To fix it, I warmed it up fully, then re-torqued the head bolts with a newer torque wrench. I believe that I had used the old torque wrench for a breaker bar 18 or 19 too many times. smile
Carl

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission