I just picked up Tamiya's Churchill Crocodile real cheap at my LHS. I couldn't find any reviews on it (a bad sign, or a good one?). Being an older kit, I expect the usual Tamiya issues - simple construction, simple details, etc. Apart from a good dose of PE, resin, and turned metal barrels, does anyone know of anything I should watch out for in this kit?

The three rectangle access panels on the faces if the engine stacks are postwar additions. For a WW2-era tank, sand them off.

If you really want to do it up right you might look to pick up the Osprey Modelling book Modelling the Churchill Tank, by Mark Bannerman. There is one chapter where a modeller makes that kit. I'm building the kit right now OOB. I more interested in how I can do a decent winter camo job than in bringing it completely up to snuff on accuracy. It's a big beast, even without the trailer, bigger than any of my other Allied armor.

The Eduard photoetch set cures many of its foibles. The new workable late pattern track for the AFV Club Churchill III also fits the Tamiya kit, curing its other great vice, the vinyl tracks.
The weld beads on the glacis plates need to be added (photos show that some were sloppy, others very tidy, but they were huge, and their absence is very obvious). Use your favorite putty, or gel type superglue to fix this.
There are missing bolt heads on the top deck along the mudguards.
If you are not watchful, it is possible to install the road wheels backwards, so make sure the detailed hub is facing outward on every axle (and make sure to switch the direction when you install the wheels for the opposite side--I learned that the hard way).
If you can find it, the softcover photo book published by Tamiya themselves is a real boon when building the Mk VII.