1 ton/dually guys need info!

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I'm considering trading my 98 Z71 for an 89 CC dually 454/T400. I've never had a one ton truck so are there any one ton specific issues to look out for?

I've had my 78 for many years so I'm well aware of the normal squarebody issues, and places they rust.

Thanks for any advice you can give.

An before anyone asks, no I dont really have any specific need for a dually. I would like the crew cab over my ext cab since I have 3 kids but its not really a necessity. Yes I will "ruin" the dually with a mild lowering and if I ever can afford them a set of semi rims. I will then proceed to drive the tires off it. Its just something I've wanted for a while and happened to see this guy offering to trade on criagslist.

Paul