LS3 first time start up

[jlwdvm]

I hooked up the pressurized oil tank with 7 qts of Joe Gibbs break in it that had been warming up over a register in my house all day. It is plumbed into the oil galley on the front drivers side of the block. I pressurized it to 70psi and opened the valve. I had taken off the passenger side valve cover to watch for oil. I got oil to some out of 1 push rod hole before the oil ran out. I think there is a lot of oil going backwards into the pump and then straight into the oil pan. Any ideas?