Lots & lots of fabrication.And some more modification.Part the '99 and buy a 347,351,408,etc-you'll be sane a little longer.JMO
I would think a mustang II frt end would be almost a gaurantee. However that is just an educated guess as I have never attempted this or looked into but it is a very wide engine so I see no other way. If you do good luck and keep us posted as it would be neat and fresh.
I say go for it. A kit from Rod & Custom Motorsports will solve your clearance issues. It would be neat and different.
WOW Quick replys! Front sheet metal all off, waiting for new crossmember. Thinking about moving front wheels 2 to 3 inches forward for better weight distribution and more clearance to firewall.