The motor mounts on the frame are slotted. If you loosen the nuts on both sides and put a jack with a block of wood under the
oil pan you can shift the engine a little. When I first built mine I had ERA weld the rear brackets on the pipes and one side would not line up. I just drilled a new hole in the chassis and moved the hanger. Good luck and dont get frustrated, there will be some new car bugs. Take them one at a time.