Thanks everyone for all the great comments! Sorry I haven't replied, I just found and added a subscription to this thread so that won't happen any more.
The wheels are in fact spare rims from an NNBS, which years or trim levels I'm not sure. I picked them up as is from Churd69 at fullsizechevy. I get compliments and questions on them from truck fans all the time.
I'm very happy with the blow-thru. I didn't want to cut out the whole back wall due to strength concerns. Afterall, this truck does see air time every now and then. With the carpet over the subs the sound is muffled a bit, but it's more than loud enough to rattle anything that's loose from bumper to bumper. I had to add screws in a few places inside to keep the interior panels from dancing along with the music. LOL
The paint on the bumpers, hood, and cab corners has been redone, maybe about 6 years ago or more. The rest is factory original....with lots of buffing waxing and constant TLC.
To update the thread without pics (I know, I know) I picked up a new toy from 6chevy9 a couple weeks ago. It's an F250 HP Dana 44. Plans are going to be very similar to 88GMCtruck's SAS build with hopefully at least a few changes such as the use of 8-lug parts. Gloss black H2 wheels FTMFW! Next week I'm dropping the truck off for a new cat-back setup. New muffler just showed up yesterday. It's a fFowmaster Super 40, single 3" center in and single 3" offset out. I'll have the shop run the tail pipe over the axle and along the inside/pass. side of the trailer hitch. I like the look of big chrome pipes but that look no longer fits on this truck IMO. I'll see if I can get a walkaround vid posted after it's all done.
[/novel]