What's better...
Short shock and longer spring? (Ex: 2" shock with 3" spring)

or

Same size shock and spring? (Ex: 3" shock with 3" spring)

Cheers!

 

shocks and springs should be matched for whatever height/duty intended. Mismatching strains them in ways they were not designed for (overcompression, overextension).

Not quite "3inch shock for 3inch coil", but more of a "these two are made to work together for X lift or X level of weight carrying". Hope that helps