I was impressed with Banks when I purchased their Power Pack package for my 460 F53, 20 years ago.
No unnecessary bending, hammering or going to the hardware store for the correct nuts or bolts.
Every thing fit perfectly. The muffler did fail last year at a cost of $300.00 but the additional HP and torque makes the ol 460 a real pleasure to drive. And the deep roar of the exhaust is nice.