After completing a swap where we replaced a 216 with a 261, we find that the mechanical temp sender does not fit the new block properly. Although the threads fit fine, there is nothing for the sender bulb to bottom against in the block, so it leaks. I am guessing that there is some sort of fitting that goes into the block first, that makes the sender fit and not leak. Can someone give me a clue pr send me a pic? Thanks very much.
Jim
