Ok, fine, so imagination ingots don't work like I thought I remembered them.
So then, instead, have Marc start up the Marc-mobile and Paul the Yellow submarine (once they put in the gas) and set the coordinates to the exact same space and time.
If my theory is correct, considering the transcendental engineering going on here, the Marc-mobile will then be parked inside of the Sub, despite any size constraints due to the temporal physics the sub so far has displayed.