I'VE BUILT A 84 CUTLASS, WITH A SBC 400,PUSHING ABOUT 550 HP, MUNCIE M21, I ALREADY HAVE BLOWN 2 10 BOLT REARS, AND TWISTED THE CENTER MEMBER OUT OF ONE, I DON'T WANT TO USE A SPOOL, AND I HAVE A 12 BOLT FROM MY 70 CUTLASS THAT I WELDED THE TUBES ON , IS THERE A BOXED TRAILING ARM KIT I COULD PURCHASE FOR THIS SET UP?