I am assebling parts for a 63" chevy swap but the springs do not have the stock chevy shackles anymore. What length are these stock shackles and are they straight or are they wider at the top or bottom? I have 6" eye to eye shackles which I believe will replace the stock toyota shackle but I will need to get a set of new chevy shackles.

 

Kind of depends, but 6" center to center should be very close to what you need.