I am assuming that a DIY is off the table?
I would find it hard to replace a good running original engine with a rebuilt just because of head gaskets
I will have to tackle mine one day if i don't sell my business, if i do the tow truck goes with it and then someone else can make the decision.
If not then i will have to dive into it some day as i could never justify 8-10 grand
90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews