No, Sum, it's sealed after being measured after you've backed up your record. No time struggle, therefore -- you're in impound, you've torn down and they've measured and it's within limits, so you re-assemble (with them watching that you don't put in your stroker crank or whatever) and then they seal.
The idea is that once you've been measured you won't have to teardown again if you get back to impound with that same motor.
Ergo: Before you leave home, drill a couple of fasteners in the various suggested locations so you can have the motor sealed. The inspectors will have seals -- all you need to do is supply the holes (and the motor. . .)