need help with clutch

[greenvilledave]

69 c1o that came with a six and three on the tree. After frame off put rebuilt 350 with the three speed but converted to floor shifter with hurst shifter. trying to get tranny to shift seems all right when the engine is off but will not go in gear tryed multiple adjustments and tricks to get more push on throw out crawl under truck and take access cover off and can see clutch seperate from pressure and flywheel. new pressure plate, clutch disc and tob but we used original flywheel from six bolted right up and seems ok. could it be the linkage or something else had to take a break i was getting really po any help would be great. dave