That popping / backfiring noise is a failing EGR valve. I do believe I suggested that prior as a possible concern from one of your symptoms previously stated.
Sounds like you keep finding problems. The first thing then is address the exhaust leak and cleaning of the veins and unison ring. As far as the EGR valv goes, that last one I had issues with showed fine on the scan tool until the miss occurred. Intake pressures were forcing it open just enough...
Get the exhaust leak fixed as these beasts have high drive pressures that are needed.
Any loss in that will spike the EGT's and throw off your temps.
Turbo barking isn't good for it either so try avoiding those hard throttle quick letoffs or that turbo will begin to eat itself up.
Since you have...
Well don't feel bad. I missed one that was only 50 miles away from my house. Knowing this bunch of goofballs the way I do now, I'm sorry I missed one so close to home.
460 radiator has much less surface area and capacity. Think you are gonna find it's gonna run hot because the coolant is going to spend less time in the radiator to shed some heat.
Letting any vehicle sit for a long period time without proper prep or maintenance will degrade in time. Too bad that's happening to such a low mileage truck with lots of life left. If I had the opportunity to do so, I'd be all over getting that one brought back to life and enjoy it.
My same concerns as well. The Delphi and Diapco kits have served well over the years. Working on them, I only had issues for a short time with a bad batch of caps that had bit of flash that got past the molds creating some trimming and cleaning issues to avoid cutting orings.
Other than that, I...
FYI. Somehow the site got linked to a phising address. Shaggy is aware of it and on it.
http://www.oilburners.net/forums/showthread.php?78728-Deceptive-site!-New-google-BS&p=931725#post931725
Calving noticed it and got accused of surfing the same website as you do Gary. :D
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