1 ton chassis for panel van

[Grunt]

Hi all, thought I would tap into the knowledge base here and see if someone can help.

Wondering if there would be much envolved in fitting a 1 ton chassis under a van shell?

I know the 1 ton chassis is about 6 inches longer but could it be modiified easily by a chop and weld job?

The reason being is that my van needs a chassis and running gear change over and 1 tonners in good condition with the right drive line combo are easier to find than a regular ute with the right combination

I appreciate ant input

thanks