rangerrider4ev

Ok so I have a 98 ranger 3.0 it has 90,000 miles its pretty much a show truck.....anyway I just said all that because I have taken very good care of this truck.....Ok so i just put a stage 2 clutch in... the second one in a year.. because I used my warrenty thinking that the reason my truck is not shifting had something to do with the clutch.......So I got a new fly wheel bled the system new clutch pressure plate the works.....slave cylinder everything....the one year old clutch was in perfect shape....so i brought it home today and I still am having trouble getting it in gear......The petal goes to the floor does not stick, engages...but it wont pop in to gear.....I was thinking it is possibly the master cylinder, the mechanic says the syncros are fine, but im lost....so has anyone had similar problems....and where the hell in the master cylinder in these things anyway...i know its a closed system but is it internal I mean is this something I can do myself ...... let me know what you think
Thanks