I know what you mean. My truck used to be a long box also, did the LS swap as well and now Im fighting aligning new doors/hood/cowel/fenders.... and getting panel gap all sorted out before primer and paint. So much time these old trucks consume but the finished product sure puts a smile on your face. Keep up the great work.
Panel gaps can really be a lot of work, and even then it might be a compromise without an absolute ton of work. I know I have some I wasn't so happy with, but it looks alright when looking at the overall truck. Be sure to share a few pictures sometime.
What's on your list to finish and change? It looks like a finished product to everyone, but we know there's always a punch list or things you want to change.
Off the top of my head the running list is:
Cut and buff the outside of the box as well as both sides of the tailgate.
Polish with a black pad on the entire truck.
Install a different brake booster.
Install a radiator expansion tank.
Figure out the outside window sweep, the stock replacements don't work on my truck.
Try to get my power locks to work better.
Polish the stainless door panel trim, and Install the door panels and all associated handles/armrests.
Put power to my vintage air and see if the heat works
Charge the AC in the spring and see if my AC works
Try to hack my vintage air glove box insert to somewhat fit.
Install the glove box door
I may cut a vent into my speaker box to allow air to flow easier through the cab vent by the drivers door.
I might change the brake pads, mine seem to dust a lot.
Change the transmission,
.
A lot of tuning once the transmission is changed.
The big one on there, besides buffing, is the transmission. I kept getting an Input Speed Sensor code, and through some research I found out that around 05-06 they started phasing an ISS into the 4L60. I didn't know this so it was overlooked when the transmission was built. I tried my hardest to get the damn thing to be happy without the sensor and did with the one exception of it failing the torque converter after a few miles. I decided to throw in the towel and change it. One benefit to how it all worked out is that I now had the option to upgrade the torque converter and maybe get a little more performance. I wanted good drivability but wanted it to flash quicker and higher so Im going to try an 11 inch and see how that goes.