70 Dart 340 engine install. Leave exhaust manifolds on or off for install

I put my engine in without manifolds. Passenger side will go in no problem. Driver side I just pulled the motor mount bolt on driver side and put a jack on the edge of the oil pan rail. Lifted it about an inch and the manifold slid right on. I dont think I had the brake booster on at that point so that would likely be in the way. It usually is in the way of everything you have to do on that side.