I have spent a lot of time and effort trying to get my Falcon the "just right look" as far as height goes. Axle under the springs was too high, axle over the springs was too low, but I built some temporary shackles that are 4" center to center length instead of the ones that came from Speedway (1 1/2"). Now it sits "RIGHT". Is there any problem using a longer shackle? I will make a set from 1/4" or 3/8" thick x 1 1/2" flatbar for rigidity. Anyone see any problems??