oil to exhaust

[roctor]

Hello fellow Pelican's,
After draining oil sump and engine. Even raised front of car
to help with the draining cooler. I lowered the car an changed oil filter and began the filling process. Lo and behold the oil coming out of left bank (1,2,3) as I poured it in. I run street legal megaphones (?) so its easy to determine. Should I fill one gal. and start car and then pour in rest while engine pump engaged? All solutions, comments or criticisms welcomed. thanks Roger