I'm looking to buy a older Chevy SW van say a 1974-79.is there anything I should...

[country joe]

...know about them before I buy? can I swap engines/drivetrains for say a 454, a TH400 automatic and Dana 60 rear axle with a locker?Maybe rebuild the interior and add a sound system.

 

[Bigman]

they burn alot of fuel but it sounds like you are not to worried about fuel and yes it can be done