There is a lot a differences and you'll need some fab. skills. I don't recommend this upgrade unless you have both vehicles!!! Half the holes in the firewall will be different. I have taken random pics and will try to describe the mods. I'll start with the dash install. Sorry, I'm using flux core wire and my welds suck. I'll be buying my gas cylinder soon!!! Kevin
Here are all the pics that I update almost weekly:
http://www.putfile.com/mopar400/images/166226
The major difference is the carrier for the steering column/brake pedal. You have to remove the spot welded brackets and make fastening points at the "A" pilar for the aluminum carrier. You must remove all sheet metal brackets on the older model to start your swap.
'99 brackets before removal
"A" pillar fasteners
Also the center bracket and the pass bracket need transfered
You will also have to modify the 4 holes by the windshield. These bolt the upper part of the dash to the body. You can see speed nut clips at the left and right. Also you can see the welds around the modified tabs. The lower 2 holes for the dash module also have to be modified at the " A" pilars.
Lower holes modified. I welded a nut to a small piece of sheet matal and tack welded it into place. I positioned it behind through the door harness hole. The hood release handle also has to be moved down about 2 1/2" as shown it the pic. Sorry, bad pic
I'll do more info. tomorrow. We've just begun!!!