Here are some more pictures, I took the trailer Axle and put it under the sub. It was wide enough to put outside the body as seen in the pictures. Problem was it was too wide (by about an inch and a half) to get into the garage door. so I cut it down and put a pipe inside the axle. Now I have an adjustable axle that comes apart!
Later, I think I may use it to put under the rear half of the old suburban and move it around that way. this time it won't be way out in left field.