I did a 2.5" bodydrop!
I think 3" is to much work for these style trucks. I found that 2.5" is the best way to go. There is info on my website how i bodydropped it.
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1962 fleetside: bodydropped,shaved,bagged,custom 64 suspension,clear taillights,custom aluminum parts,rollin on 100 spoke player wire wheels.
http://www.finelinedesignz.ca