[Geoff]

I don't know how low you want to go but from my experience once you go over 2 or 2 1/4 coils the ride gets pretty bad. With 15x8 245/60/15 with the above mentioned coils cut my front bumper on my 68' was between 6-7in off the ground.

Sometimes you don't notice much and then you take another coil and your like holey crap what did I do.

Good luck