If he justs peter putters around... probably last "forever" ...
Since the montana depending on model/blah can be nearly 4000lbs sitting
there, Doubt will last long if he plans on romping on it much... turbo, no go.
Unless he finally put in work that no one else has been brave enough to do
to improve the crummy AWD parts
The old GP G8 car would shatter everything when it went WOT pretty much,
but whos to say he even did it "right" ....
Still neat to see.. i wanted to motor swap my dads 01 Montana when he got it.
Was funny when everyone would say the L67 and such would never fit or work
right back then....