[monsterdog]

I tried this unsuccessfully a while back. I'll never try it again. I thought I almost had it after endless wiggling and yanking and knuckle busting and prying.
The headlight pump and steering lines make it a huge pain in the arse.
I was trying to get it out from the top though. The tank seems too tall to get it out the other way. I figure if you remove everything around it, you may have more luck than I. Just FYI, it's not very flexible at all.

Mine leaks a little about half way up around a seam on the rear inboard side if you're looking at it from underneath, with feet sticking out from the front of the car. I was going to try some kind of sealant, but wasn't sure what to use.

One thing I did find is that if you get the headlight washer pump out and give up trying to get it back in while the tank is still in the car, a tapered rubber and brass plug works well to stop that hole - you tighten the plug and the rubber compresses between two brass plates - they use them on boats and such.