4 speed non a/c hardtop with none of the other fluff crap is nowhere close to 4000lbs and it was as it came from Flint, but whatever gets you through the night…
3102 dry weight of my LX…add oils, gas and anitfreeze (unless you plan on driving w/out those items) and that car is right where I stated…3400lbs and yes 150 lbs lighter than the 70 Stage I. Actual claimed dry weight on the title is 3550lbs from Buick vs claimed dry weight of the LX 3102…448 lbs difference.
Again, back to the original post…some of the finer resto rod Mustangs built have gone the route of a speed density engine, complete with new technology A/C, electronics and interior touches for years now and it is a pretty easy car to build. Here is a link to a Mustang Monthly article that discusses many of the different approaches to building that Mustang of yours: http://www.mustangmonthly.com/thehistoryof/mump_0504_rebuilt_vintage_ford_mustang_best_build/index.html