Want everything to be tight....

Adding subframe connectors will make a huge difference all on its own. It's been the best modification for "feel" on my Mach, making it squeak less and seem much more solid. In fact, now when I jack up a corner of the car, the whole side raises. How's that for solid?

So before planning any other big welding, add the subframes and see what you think. The braces between the connectors and the rockers is a good idea also. And if you haven't already purchased subframe connectors, consider getting the kind that weld into the floorpans also. These are different than the TCP or Global West tubulars, so check places like Alston Chasisworks or Competition Engineering. Oh, and don't forget to add things like a one piece export brace and a montecarlo bar. These will help.

One last idea: consider using one of the modern soundproofing coatings on the chasis. Mustang & Fords magazine (which I hate) has an article this month about using one of these new coatings, which is supposed to soundproof and rustproof. Also, I hear really good things about Dynamat, expecially applied to the inside of door shells and quarter panels. These don't help solidify the chasis, but they will help with making the car feel and seem more solid by eliminating that tinny rattley character our cars have. I've heard that when you apply the Dynamat to the inside of your door shells, the doors then make that really satisfying "thump" sound that new cars make.

Hope this helps.