My "spare" 727 for my old Mirada running a RB 498 was nothing special. Reverse manual valve body. Foot braked it into the 10's. I had enough parts to throw it together as a backup plan. Ended up selling it after getting rid of the car. So I'm saying "yes" it's capable.

now... would I run it with a stock front drum. NOPE!

Are 727's "bulletproof"? NOPE! I currently have a 727 in the duster behind our small block. it's been out of the car 4 times in the last two years with odd and not so odd breakage. Most recent I broke the lugs on the pump gear. Hoping it will last now with aftermarket large lug gear, but I'm piecing together a 904 because I like torture