I have used the Canton pan, an Aviaid, and the Armondo. The Canton pan is nice, but a pain if using 4 bolt blocks. Also has the scraper that will need to be hammered down for some stroker applications. The canton is gold colored, while the others are silver.
The Aviaid I have commented on in the past had poor QC and on top of that a pickup full of welding slag that I could not imagine getting out the door. The pan leaked on first install (Bad weld) and the skid plate in not sealed to the bottom of the pan where the drain plug is so oil catches under it when you drain it. Also had paid extra for the SVO 4 bolt clearance which ended up being 50 bucks for a hammer job, that still didn't fit. So, no, not happy with them at all. Pan was also expensive.
I have 3 different Armondo pans, one on the GT40 which is an alloy dry sump, no problem mentioned when on the dyno. The others are one on my 65 Mustang that is the 9qt pan made for the 4 bolt block and fit, no leaks, skid plate welded so no oil gets captured. Just got a Sunbeam Tiger pan that was very nice too and a more complex pan, it is not on the car yet, but looks to be very well made and both the steel pans were a few bucks less then Aviaid. Don't remember if the side scrapers (windage ??) needed to be hammered on the 331's.
The only downside is Armondo is a bit low tech for ordering, so you will need to do a few phone calls, he takes paypal for a 3% charge or will take check or COD.
Sandy