Is It My Clutch Or Something Else?

[az ranger]

When I start from a dead stop and release the clutch It hesitates then kinda lurches into gear. it almost feels like the hole drivetrain is moving. it does not do it any any other gears the only time I notice it is from a dead stop. the drivetrain does not move during normal driving even if I stomp it feels tight.

the clutch is a luk that I installed 1.5 yrs ago along with the sm465 hydro swap.
I have not had any problems until 1 month ago.

any ideas from that vague description. I dont know how to explain it any differently.
thanks