I made the jump and started trying to remake the
oil filler tube . I removed the old
oil filler tube. It turns out there is only about 3/4'' of tube in hole with the back making about 1". Total length is about 5 inches long . What I didnt plan for is the #1 intake runner has a notch in the front for the filler tube as the original hole continues outward, and I can't start a bend untill the tube is above that. I had a tube with a bend at 1" ,all welded and ground and shined up. If I had a TIG machine I could keep myself busy. So the next attempt will be about about seven inches tall with the tube notched and bent at 2" above the bottom.