[Richard]

Putting a shorter spring in a vehicle will not cause a stock length shock to bottom out unless the bump location was altered. A vehicle is designed for a shock to fully compress at full bump. You could remove the springs completely and set it on the bumps and it will not bottom out. A shock will behave the same at all static positions. By lowering, up travel is diminished. Using a shorter shock to limit down travel is more relevant as the bumps prevent bottom out. Shock valving (dampening) is the issue. Finding one that suits your needs. Stiff springs and stiff shocks equal an uncomfortable ride.

Edit- the KYB Excel G are really soft. My brother in law went with those less expensive shocks on his 98 Suburban and it rides like a boat. The Gas-a-just mono tube are what I used on my lowered ride. They were excellent. I warned him before the purchase.