Oh god no, I wouldn't touch it..lol
They have everything to do the job a lot quicker then I would PLUS they would be warm were I'd freeze my nutz off.
So an 8 hour day @ roughly 75 to 100/hr should cost between 600 and 1000 to install.
Is that a lot or a decent price?
If it were me.. Unless you have a guy you can trust otherwise I would take to SW and let them do it... You never know what they will use for a gasket and ya them might repair it but the truck might be down for a while... Im telling ya SW is a class act place.. great shop, great ppl and they have done enough to know what to expect...