What I did with mine is loosely bolt the engine in where I thought it should be, mount the headers and side pipes. For mine the side pipe has a particular location to mount to near the rear wheels. Now I am unsure how yours is and if you are using side pipes or not, this is just how I did mine.
As for the
oil filter, you can use a short, half quart filter or use a remote one. I chose a remote filter setup.
Hope this helps.