I have a 440-512 stroker motor, with less than 500 miles on the motor. Everything is either new or rebuilt, 10.5 to one pistons, 509 cam with 1.6 ratio crane rockers, with 915 closed chamber heads ported and polished new valves, guides, seals. With a six pack intake. I took the front carb off and noticed oil in the bottom of the intake but not alot. Is this normal on a new engine? I do not understand how oil would get there in the first place. Can you guys please give me some ideas on how to fix this? Thanks