If it is going to cost you $1000-$1500(and that seems about right considering shop labor is $100/hr or so), you might as well get a new-not rebuilt,new-GM Goodwrench motor for the same $1500-$1600. I'm planning to do the same thing with my 196,000 mile motored Suburban(which is running good).It is possible it is just valve guide seals-does it give a good puff of smoke at startup,and then not smoke after warmup?
If you have a lot of blowby it should run like crap(power down,and missing),and the plugs should be fouled?
have you done a compression test? or a leak down test? the leak down will show if the rings are bad and you can get a short block almost anywhere for $499+ depending on what add ins you add. i do a leak down and see if it is valve guides or rings....mike
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