offset parallel four link

[Driveway Werks]

I have a 1970 C-10 that I plan on back halfing. To line up the new 2x4 frame with the old frame it will put the bags real close to the axle chuck. I don't feel comfortable mounting bags this close together. I thought if I mounted the upper bars on the inside of the frame I could then mount the bags on the outside over the axle. Is this possible? If this is a bad idea would a wishbone be a better solution? I haven't had much experience with a wishbone but it seems to be the only other possibilty because the frame is so narrow. I may tow with this truck some and want to try to keep the bags over the axle if possible. I'm looking for any kind of input or suggestions anybody may have.