Nominal

Heavy vehicles are a different crowd. https://vehicleinspection.nzta.govt.nz/virms/hvsc/tb/modifications-to-trucks-cabs Main lesson is, don't cut up the cab nowadays. Pretty harsh to be invalidating existing builds though.

Flathead and Fast don't really go together, unless you fit an air pump.

Mostly this

I'd suggest starting at 1k each and see how you go.

I though that road was barred to 4WD these days.

Wind up clock spring starter like the lawnmowers used to have?

You gonna be spinning it backwards?

For general garage activities I've had fair luck either getting a take-out one from the local garage that still load tests OK, or buying used ones on FB/TM. Only lost out once on a dud for $50.

How smashed? I'd probably just 'plate over' it with some plastic sheeting of some sort and jb weld or silicone. It's just another vent, right?

Pushed the B-pillar up some on one side then welded in a brace. Need to do the other side now Top tip, don't use the rubber pusher end on the ram against a sharp edge. Also unbolted the rear seat back without too much trouble. Had to dismantle it quite a bit to remove the main support bracket so it can go into the molasses tank.

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Carb to EFI or vice versa is now explicitly captured

Every job on a car project is worth doing twice, if not three times.