My apologies, I should have provided more info in the first post. I already have '10 OEM GT500 take-off wheels and tires, and plan to upgrade to the Strange 10-way adjustable struts/shocks. I don't plan to swap the sway bars, and don't want to lower the car, which means aftermarket springs are out as they all would lower the car at least an inch. I was thinking that the GT500 springs might be better springs than the GT springs, while still retaining the OEM ride height.
So I guess my main questions are #2 and #3 from the original post:
Would they allow me to keep the OEM ride height?
Would they provide enough (if any) advantage over the '11 OEM GT springs to make the swap worth it?
'14 F150 4x4 SuperCrew 302
'11 GT MT w/ 3.73s and some bolt-ons 550 RWHP / 490 RWTQ 11.94 @ 123, 1.84 60 ft. Wannabe Sleeper