I was at a car show with my 70 chevelle and someone commented on my by pass should not be painted. That didn't really bother me but it brought up a sore point I have had with judging in the past. Twice I lost points because I was told the by pass hose should not be painted. One of the judges said I had too much paint on my exhaust manifolds, but also told me my original 772 fan blade was made in 1972 so I just ignored his opinions. I worked on these cars when they were fairly new and worked on many original corvettes and distinctly remember the by pass hoses on CAST IRON manifold cars were fully painted. The paint did not adhere to the rubber hose so after 40 years only the clamps and part of the hose has paint remaining on it. Aluminum intakes had a mask that also covered part of the by pass hose but that's a different animal. Last night I got view an Original owner 1966 427 Vette that is one of the most untouched cars I have seen in many years. Her car shows paint on both ends of the hose.This is a NCRS awarded car. The B&W photo is from Chevrolet archives and clearly shows the hose painted. Another archive from VN shows the how BB exhaust manifolds were painted. I will also post how I painted my engine and would like to get comments, positive or not, if you feel that I did it correctly. This engine has not run in 18 years so more paint will probably flake off after I start it.
Thanks for your time. George.