superstock seat install help

ok i have a Set Of SuperStock Aluminum Seat Brackets With a Set Of LowBack a100 Style Seats That I'm Trying To Install. The Brackets Are Left And Rights And One Is Taller Than The Other. I'm Totally List On Which One Goes Where And if There Are Any Measurements For placement. Keep In Mind These Are Going in a 74 Swinger with stock floorpans and originally a bench seat car. Any Help Would be Fantastic!