Pulley Setup for 340 Assembled 4/20/1970?

http://chucker54.stores.yahoo.net/strepu.html

You will need a MREBU4011 crank and MREBU4015 water pump, and a single pulley alternator.

It will look like this
[ame="http://www.flickr.com/photos/saddletrampimages/2457293543/"]70 Duster 340 engine compartment | Flickr - Photo Sharing![/ame]

The alternator bracket looks like this:
http://chucker54.stores.yahoo.net/a1laalmokitw.html