5-Speed Swap - Violent Shaking

[nismoracingsx]

So here goes:

Did a 5-Speed swap on my recently acquired 95 240 w/ ka.
Everything went pretty smooth, automatic stuff came out, new clutch w/ lightweight flywheel went in. Transmission went in, pedal install, etc etc.

Clutch bled fine, car goes into all gears just fine.

PROBLEM: Intermittently the car will shake violently when I push the clutch in. Not as soon as I push the pedal, but shortly after. At first I thought it was only when the car was in neutral, but it also does it in other gears as well. If I push the transmission into another gear, the shaking will almost always abruptly stop..


Car drives fine, but the shuddering/shaking had me park it back in the carport

Thoughts? Clutch? Pedal adjustment?
Ran out of daylight so shoot me some ideas.
The transmission had unknown history and even sat at my house for like a month or two.