Finally got the street exhaust finished up (I hope) last night. It took far longer than I'd hoped it would- and honestly would have been a lot quicker if I'd not been trying to save some money and use the pipe expanders I grabbed from Advance's rental tools to avoid having to get more couplers. I also ended up running out to Lowe's and picking up some Lincoln flux core welding wire to use instead of the stuff that came with the cheap HF welder. It's still not good, but it is an improvement. In the end I did use like 5 exhaust clamps (2 of which were unavoidable since they were on either side of the flex pipe I used). If everything works out well I may go back and weld up some of those joints, but for now it seems to work pretty good. It sounds RIDICULOUSLY quiet compared to before- I ended up using the muffler I got from the junkyard instead of a Thrush glasspack (though I did pick one up and was considering using it for a while). There's little doubt this system will be a bit more restrictive than ideal- but it's for driving around normally and not racing and I'm sure the engine will still put out plenty of power with it.
Since I was under the back of the ute for a while anyway and was getting sick of staring at them, I also pulled out the old gas shocks and mostly installed the new adjustable air shocks- I still have to install and route the air fill lines before I drop the back end off the jack stands.
Unfortunately with the exhaust taking so long I didn't get to even really think about what needs to be done next- pulling the dash to replace the heater core- from my pressure testing it seems there's a small crack in the lower pipe the leaks at full pressure which is why I've had to keep filling it up with coolant repeatedly. Unfortunately replacing the core requires pulling the whole dash out, and if I'm already doing that I'm going to do anything else that would be more easily done with the dash out of the way (like re-doing the cluster with the more useful gauges, re-wiring the cigarette lighter so it has power to use, etc.).
It's a tough call on whether I really want to start on that at the moment of hold off- it's supposed to be colder and a bit rainy this next week, and if I start in on the dash it's going to be a good bit of work and obviously I won't be able to drive it for a while- so it's tempting to hook the old heater core back up (right now I bypassed it under the hood) and just deal with checking the coolant level every so often and hold off on replacing it for another 2 weeks when I've got a Friday off and can actually use my Saturday (today- and tomorrow as well- I'm going to be lucky to even have the time to finish the air shocks and get the Rampage drivable without heat...).