Allen, The clutch should be able to be adjusted within the normal range. I would try to screw that rod in a couple turns at a time until you get the proper free play at the pedal. At that point it should engage further down. If you have the ceramic style clutch they are very grabby, they are basically in or out with not much slip to them. I prefer my clutch to engage closer to the floor than the specs so I adjust it accordingly. If you can't get the engagement further down in the range then there might be a bent linkage or worn flywheel. I just pulled mine and I can tell you that the ceramic clutch ate the flywheel!
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone