"Screw replacing all them chassis bearings find you a newer 400 or 450 rolling chassis to put the motor in!"
You said it. Don't know how its done, or how to do it. So why tell someone to do it. If someone told me to put my 500 Zilla engine in something else I would tell em to get fukd. Some bad bearings, duh, just git rid o it and wedge it somtin else.