Thanks for posting. It's right on time for me, as I'm gathering parts for my 403. I'm assuming since your mentioning it here, that there is no interference with the crossmember?? Now for the dipstick... use a BBO stick, or... There has to be a fix, in order to get a proper reading on the stick.
There will be no interference with crossmember, built a very angry olds 350 back in 1988 and dropped into my 1986 442 with a BBO pan. Miss that car but still have the engine.
Proper reading of the stick, at that time I knew it had 6 quarts of oil. How would you fix it to read correctly, just an idea have the engine on a engine stand with the pan on add oil. Insert the tube but not all the way then add the dip stick and see what you get for a reading make adjustments as needed. Its just an idea.