Right update :
Managed to bleed clutch in field and was able to select all gears but only 3 and 5 with ease, the rest required foot hard to floor and forcing.
drove home and removed the exhaust system, and removed the slave again - Took the push rod out.
Purchased another push rod for the gearbox (LT77 standard bell housing) and compared them, the new one was 3mm longer, and the old one was slightly flattened at the ball end, so assumed this would be contributing to the issue.
Checked the arm inside with a small mirror and its all fine, no punch through etc (which was ruled out as able to change gears anyway).
Re fitted everything, bled system using a "Gunson Easybleed" and no real difference.
Their was a brief moment yesterday test driving where I could change from 1-3 and then to 5 with ease but this then stopped and went quickly back to difficult.
The bite point seems to be very very low on the pedal but Ive adjusted the master to the max.
So could I still have air in the system? given that the clutch behaviour does change abit, or could it be something else? Garage I buy parts from thinks its doubtful a clutch out job based on age of clutch.
I can use abit of hooked wire to pull the clutch arm forward to the opening in the bell housing, and then I push it back with the wire till it goes firm and at this point place the push rod into the socket/hole. At the point the new rod sits 2-3mm proud of the housing - is this right? The garage seemed to want to offer no comment really. Would that give enough travel to disengage the clutch?
Ive got a pic of the rod if needed.
Otherwise should I reverse bleed the clutch?
Is it possible Ive got a bubble that just wont shift?