i dont know if anybody would know why it would do this but my car revs up and when i push the clutch down in 3rd to 4th and 4th to 5th but only when the ac's on? any thoughts?

mine does the same thing, i have a suspicion its the oxygen sensor, not sure which one tho, just give both a test see which ones bad

Mine did it too before I swaped to the atx tb. It might be the return spring on your tb. That's what I suspected it was on mine.`

check your vac lines it might help