they dont lock but they are real hard to spin. i drilled a hole and ran a spring loaded pin threw it. look in the sporting section were the fishing shit is. you can get a post there to were the swivel bolts to. i made a bracket to the origanal seat frame so it can go back and forth. this is the cheap way out . I think the real seats came out of a 73 monte carlo. even if you can find them it will cost you your first born kid.
i saw some on a boat site but they just dont have that exact shape im lookin for. does any one know some thats good with that might be able to make some. thanx for your help so far i still gotta hit up wal mart