shock length

I am installing some Slide-a-links ( thanks littledeuce2) and moved my shocks in board as I have some shock mounts welded on the axle. Upon moving the stock shocks inboard the shocks were too compressed and had no travel due to the axle shock mounts being higher than the stock lower shock mount . Do you know how I would calculate the lenght of shock required to accomodate the inboard shock/axle mount set up?

Thanks

i just bought a kit for moving the shocks in side it can be bolted in and came with shocks got it at performance online .com

Found the info:
Shock Travel is the change in shock length through out the wheel travel. It is best to maximize the shock travel; this reduces the load on the shock absorber.

To get this value from an existing vehicle:
Support the vehicle weight with a lift or a jack so that the vehicle is not suspended on the suspension system.

Remove shock, spring and swaybar (if any). If leaf sprung, do not remove all leaf springs; leave at least one to locate the suspension components.

Bring the wheel to the lowest point (also called full-droop or full extension) allowed by the suspension linkage system and measure from the lower shock mount to upper shock mount and note the distance as Extended Shock Length.

Bring the wheel to the highest point (also called full-jounce or full-bump) allowed by the suspension linkage system and measure from the lower shock mount to upper shock mount and note the distance as Compressed Shock Length.

Make sure that no suspension link binds with wheels turned to full left or full right through out the entire wheel travel. Also check that the desired tire clearance is maintained check all other components (brake components, brake lines, wires, sensors, drive-axles, drive-shafts, CV joints, U-joints and etc.) to make sure they can function properly and that there are no clearance issues.

The difference between the two noted distances (Extended Shock Length and Compressed Shock Length) is the actual shock travel needed.