i've noticed that too
oddly enuff,ALL V8 cars(with the exception of the 1993 cobra),no matter what body style,came from the factory with the same exact springs
the aftermarket may take into acct that the convertible is heavier than the hardtop cars,and provide a slightly stiffer spring
__________________ 92 lx 5.0 vert-,stock plastic airbox,stock T-5,shifter & clutch,stock 19lb injectors and fuel pump,no radio,speakers or cruise control..antenna delete(for less wind resistance)
(new)best so far 12.712 @ 105.99mph 1.752 60ft
FOR SALE/TRADE: 17x9 Chrome Cobra R wheels w/ tires,check my classfied ad | 
difference between Mustang notchback and hatchback lowering springs 
