Thx Gary, that's a great link.
While we're at it I have something else. My 390 dipstick tube was very worn where it enters the block, it pulls out with the stick. I ordered a replacement from Summit. What they sent is longer than the one I have. If I hold them side by side and line up the stopper ring that hits the block the new one is a little longer. Summit is sure what they sent is correct. Should I be worried?
I know the motor I have had been worked on before so maybe they used the wrong length?
thx, Dave J