My .02 worth.

I'm not sure what chassis you have but one picture makes me believe that it's a TCI or a clone. For whatever reason, TCI likes to supply too heavy a set of springs on their Aldens. So far TCI have paid the shot to replace my fronts and since I've been so long building the car, I'll probably have to change the rears out on my buck. They supplied 300# fronts(now have 250# and might need 200#) and 250# rears - and for an 'A' roadster. I'm just finishing it off now, but there is NO downward movement, even with the almost full '32 style gas tank in the rear when I get in the car, so that leads me to believe that I'll be spending my $45 or so each soon for something like a 150-175.

As a suggestion, when you pull the coil overs off, you might try to disassemble them on the bench, cleaning up the threads and lubing the adjuster (you did loosen the lock ring?). It might just save you a few (a lot!) bucks. Mine are assembled with anti seize (I hope you have the right spanner wrench to use)