if it still runs good i would pull the heads and replace the headgaskets.probably your cheapest option if you plan on keeping it.a 6bt is no way in h3ll fitting in a van.for one the front suspension would never take the weight.but in the end probably your cheapest option is to find a different van.

I would have agreed with you until i read a thread where a guy fit a 6bt in an express with a 1.5 inch body lift. Actually fits amazingly well.

Suspension should have no problem on 3500 chassis

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