323 open 741 third member

just like it says there is nothing wrong with it as it appears, i bought it for my 8 3/4 swap because i thought i had 29!!! in 71/4 and wanted something shorter and bought this,but just found out that i have 323 in my 7 1/4 so i got a 391 open now but i need a sure grip carrier or some kind of posi for my 391 third member, i will trade or sell for 125$$$ obo shoot me a pm and lets talk thanks located in riverside ca