Big block or built sb,or stroker?

[al's71gmc]

I know it's not the responsible thing to do. Almost everyone is looking for fuel economy. But I'm wanting to go the other direction. I want torque and horsepower!!! This is for my 71 3/4 ton 4wd. So i'm trying to figure the best way to go. A friend has a 427 from an early 70's 2 ton truck. I haven't got to check it out and get #s off it. It's supposed to be a low mileage rebuilt engine. $1500 includes carb to oilpan. My other inclination is to go to a stroker. I'd like to get some feedback from you guys. Another concern for me is weather my 350/205 will hold up to either option.