Maybe you can tell Busdaddy that you’re not well enough.
I would feel compelled to go. He can’t put the engine and transmission in by himself. That job needs at least two pairs of hands, if nothing else, one pair to stabilize the engine block while he is moving it into the correct position.
I just checked DMV, and the site computer told me I couldn’t register the vehicle online until I got the smog test, so that’s a relief: I don’t have to go stand in line forever! YAY!