brown1

is there an extended pinbox that fits the 1621 mount like other mounts? mine currently is 17.75" from front bolts to pin center. other models offer a 20" bolt to pin measurement. not really interested in a sidewinder or autoslide. my truck is a 13 f350 ccsb and i am running a demco hijacker hitch.

PerryB

Thats already a lot of extension. If you go further, you risk breaking your forward trailer frame. The greater the extension, the greater the twisting force applied to the mounting wings. Personally I wouldn't do it. Lippert frames already have enough breakage issues, they don't need any more help.
How far can you presently turn before cab contact? My last SD was a CCSB and I put a manual slider in due to concerns with cab contact. A full-lock turn left me room to spare (without moving the hitch) but I was still concerned. We ended up going to Alaska and never slid it once.

johndeerefarmer

I agree with PerryB. Don't try to extend it. Lippert is known for broken frames and cracked welds