The autolite 1100 is what I had and those remanufactured ones and the ones we rebuilt never ran right. Most of the time they would either flood out all the time or vapor lock.
I got my 1 bbl autolite form a place in Woodstock NY I believe. I can't remember the name at the moment. I think we paid about 300 bucks for ours about 10 or so years ago. It ran trouble free for several years until we had the engine problems.
Those Pony Carbs look nice but a bit pricey.
I think as long as you get a brand new one you shouldn't have many problems.
Here is one thats not quite as expensive.
http://www.mustangsunlimited.com/ite...asp?T1=C65A+01