If you can fit them in the front, you can also fit them in the back. But you will need different lengths for front to back.
And spring rates can be all over the place depending on who you buy from, so be sure you know what your getting.
set of 4.5 in one end and 6.5 in other work? the 4.5 wire is 5/8 and i thing 13'' tall. he said something about load being 200lb or something like that. does that sound right?
I either asked him or read it somewhere but they made reg and HD Aero coils -True Aero star coils are to soft.
200lbs is close enough