I wouldn't mind having a 3+3,I almost bought two of them years ago,but passed on them because of excessive rust issues..one was a '74 ,it had a 400 SB/Th400,the other one was a '75 and had a 454/Sm465...about the only disadvantage to a crew cab is they are LONG and aren't easy to park or use to plow with,and those are 2 important things to me..
I always end up having my cab full of crap like jumper cables,spare battery,jugs of oil,etc,things I dont have room for in the tool box,and dont like leaving out to the weather or for crackheads to swipe in the bed..and you end up with no room for a passenger,groceries,or yourself..
That is why I bought a Suburban,unfortunately I've never been able to scrape up enough money to put it on the road,and now it has sat 5 years,and needs a lot more work than it did when I parked it where it sits now..the other day I started it up,and it now has no brakes,at least one line has rusted thru now..

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It would be nice to have both a pickup and a Suburban,because neither is the "ideal" all around truck--the Burb cant haul a lawn tractor or a couch,or a fridge,and a crew cab doesn't have quite enough room for more than 4 people if your going out on the town...
I loved my K5's but they had their shortcomings too--too short a wheelbase for a smooth ride,not that much room in them,and they cant carry the things I listed a Burb cant--but for plowing they were great,you can turn them around on a dime,provided they are on stock suspention and tires..
I cant say I "love" my 6.2's but I dont hate them either...if fuel was not more than gasoline I'd like them a lot more,and if I were as familiar as I am with GM gas engines I'd like them more too...they look a lot harder to work on,as far as doing a water pump,and anything behind that--but I've not had to touch my injector pump or anything else in 12 years either!..I'd probably just drop in another used engine if the ones I have gave any major grief..