Convertible A-body (67-69 Dart) Rocker panel reinforcments

Hey, i'm in the process of buying all the sheetmetal for my 1970 Swinger 340 and i'm going right back to original. I was thinking of reinforcing the rocker panels since i'm replacing them anyways. Its a factory four speed car so it has the front and rear torque boxes already.. I want to run sub frame connectors but i'd rather do something thats hidden and since i'll have the outer rockers off i was wondering if anyone has done anything to tie the torque boxes in? i heard convertibles had additional steel added in the rockers but i haven't found any reference pics.

Any ideas? or pics of a convertables rockers?