New clutch doesn't work

[Greasey Harley]

I blew up my clutch in my '68 c10 this summer (kuz I got a lead foot)
I let it set around and finally got around to putting a clutch in it this week.
Put a Rhino pac diaphragm style, stock clutch in it. hooked everything up and the clutch just isn't there. almost no resistance, pedal goes right to the floor.
Can't adjust it any further. Something is definitely wrong.
everything seems to be installed properly. This is about my 20th clutch swap (not all on the same truck), first major problem I've ever had.
Any guesses? Thoughts,
I'm about to go back out there and re-remove the engine and take a closer look.
Pretty simple unit, I can't imagine what I might be missing.
Has to be one of three things
1: Wrong clutch kit
2: Defective parts
3: Improper installation

-Russ