Could anybody tell me the differences in the chassis between say a 1986 Mustang, and a 2000 Mustang? If any?

A co-worker suggested finding a good condition 1980s Mustang Chassis and putting in coil over springs for the car I will be building. It may be easier to find a cheap early 2000s Mustang for cheap but need to know how the chassis of the different years differ to find out if a chassis from that time period will work just as well.

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2006 Mazda B4000 parked in a snowbank behind a shop somewhere

My guess would be that the newer mustang chassis is longer, longer wheelbase and weigh more than a fox chassis. There's at least a 1,000 lb difference between foxes and new edges.

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93 Ranger XL 3.0 V6
-Tint, wheels, K&N filter, Flowmaster super 44.
04 Mustang GT Vert.
-Tons of mods, supercharged 392/393