I just got done installing a new old stock Edelbrook 2156 intake on my 69 350. I also installed a brand new 4 core Rad. When I was filling up the Rad, fluid started leaking on the back and the front of the valley pan. I had 2 other people try to watch where it was coming from with no luck. We had a phone camera shoved under the intake trying to spot possible leaks in the intake and saw nothing. Any clue???