[shaker455]

Jeff,
Lets see your coolant routing.
Anything on the ground besides over flow bottle?
Sure looks like oil mixed in that tube.
I see a lot of hose clamps on over flow tube maybe obstructing the cap from fully seating Also maybe the cap is no good.
I like to fill the engine right down the thermostat housing then install the stat with a hole drilled in the side and finish top off.
then I slowly rev motor so it will draw the coolant down and top it off before letting off the throttle
Jeff