Outer rocker replacement help

[ryans69chevy]

I'm having issues with getting my outer rocker seated where its suppose to be. It needs to be dropped about 1/4", but the ledge of the inner rocker is keeping it from not being able to drop anymore. Anyone have any ideas or see anything wrong?

I put a new floor in years back as well as the lower pillar patches and cab corner - thats why the welds look a little rusted. I remember not being able to get the outer rocker on so instead of walking away from it I cut part of the inner rocker out - still couldn't get it so I switched to a different project on the cab.

Ive read through numerous threads and looked at pics, but haven't seen this issue. Today I tacked in the inner rocker and aligned the door basing it off the line above the door handle. Measured the gap around the rest of the door. Cab is sitting on dolly. Was debating on putting this cab back on frame and assembling fenders. Necessary?

I haven't ran all the bolts through the cab supports into the patch panels yet. My idea is to cut the whole length of the rocker where my thumb is and weld in a piece of metal 1/4" + or - to get the gap at the bottom of the door correct. The rocker at the cab corner is about 1/8"-1/4" too high.

All these parts are "key parts". I knew the rocker would need to be "massaged" a little to fit into place - just wasn't expecting this much. Wondering if im going about it in the wrong way.

Thanks for any advice.