Tom R,
I may be soaking wet on this, but the fitting that is leaking on your block is a very special item. I have hunted for the name of this item, but can't seem to find it. I have these at work on Lincoln Centromatic lubricators.
If you look at Tinys picture, you can see that this fitting has to seal the tube where it passes through the block. It has no end termination...it must seal around the outside of the copper tubing. I find it hard to believe that a NAPA store had the proper fittings.
I looked in Chevs of the 40s. They have this item in their catalog. I didn't realize it was such a bear to install. Maybe your "in situ" goop job will do the trick.
Stuart
