[Advanced Design]

Really great information from dsraven. The only idea I could add is once the new ifs crossmember is tacked in place, assemble the suspension with wheels and tires, then throw the front fenders on to make sure the wheels are in the correct position in the fender. It is better to verify the crossmember is in the correct place before welding it in.

And of course another option is to buy a complete chassis... I believe Roadster Shop, Art Morrison, Fatman, etc. has them available

Hopefully your friend will join in here as there are lots of talented and knowledgeable folks willing to help.