I had a couple of things that I either forgot to mention or have learned since my earlier posts, so I thought I should share.
I recently realized that I forgot to mention having to replace the Ford Fuel Filler Neck Seal when I installed the fuel tank. Luckily Ford used this seal on several different models, so they are fairly easy to find. The seal part# is E1AZ-9072-B, and I purchased mine from Amazon for around $15 with shipping.
It was a fairly tight fit, but I am pretty sure that it was supposed to be. I had to put a little oil on it to get the filler neck to slide in, but I don't think that will hurt anything.
I also heard from a fellow Granada enthusiast that a stainless fuel sending unit from a 1971-74 Ford Maverick will fit the Granada's gas tank. It is a good bit cheaper than the route that I took since you can get them off of ebay for around $75-$100. He purchased one for his Granada and found that it did work perfectly. Hopefully that will help someone out who may stumble upon this!