[FLYNAVY30]

For what its worth Woody, I just placed my order through Rock Auto. I went with the 6104/6101 constant rate combo. I did note that the 6104 is the only front spring listed for the C20 with a big block....its listed as the heavy duty option for a C20 with a small block with 6102 being the standard for the small block.

Though now that I talk through that, I probably should have gone with the 6102 in front, given the fact that I've got an LS motor in front now. Hmmmm....I may need to call Rock Auto in the morning and adjust my order.

Bottom line is 6102/6101 are the standard rate springs (front/rear) for a small block C20
6104/6103 are the standard rate spring (front/rear) for a big block C20, or a small block with the HD option.

Clear as mud right??