The dod stuff in those trucks is terrible. I have been working on these engines for a long time now and have had enough of them with issues with just the dod crap to say get rid of it. I usually recommend people buy 4.8’s for swaps because very few even had the dod/afm stuff. I currently have 2 LS powered vehicles (both swaps). Ive done multiple swaps and the only issues i ever see the others have were related to that. The solenoids will leak down sometimes and actually cause a 4 cyl mode when not requested and some will simply wear out the lifter bore from lack of oil and ive seen one spin in the tray and take out the cam and glitterbomb the motor. I just did a delete on one in a 72 c10 a month ago and the owner is nothing but smiles when asked how it runs. Its a pretty straightforward thing to do. No big surprises. We pieced his together with a front cover I already had and a used gear from another motor. He was putting a different cam in it anyways so it all made sense.