I'm installing my engine and I've came across a speed bump. Do I install my headers before/during/after to engine install. It's a very tight squeeze either way. Please help Olds Gods. I know you're out there

 

Most headers go in from the bottom, the car needs to be up on jack stands as high as you can get it. Sometimes you may have to jack the engine up a little to slide them in place.

Sometimes you can just wire them off to the side while installing the engine. Kind of personal preference.