First Ride Stuck in First Gear, Any ideas on how to fix this? Options

[R_u_dd]

This is the maiden voyage around the 100 foot track in the backyard. Unfortunately I've got something wrong with the clutch or transmission. This is a Subaru conversion with 2.5 litre SOHC engine and Subaru 5MT transmission (push style). The issue is that I can't shift while the engine is running.

- The transmission shifts through all the gears while the engine is off, but will not shift while it's running.
-The clutch throw seems to be sufficient. I've got a 3/4" Wilwood Master cylinder and the stock 3/4" slave on the transmission.
-The clutch seems to be engaging properly because I can start the car in 1st, 2nd, or third and move the car forward, engaging the clutch slowly to drive the car forward.
-Notice when I put the clutch in to slow down around the corners in the video that it makes a rattling sound like the clutch fins hitting something.\
-After this video, the clutch fluid leaked out do to the push rod being over extended, but that's probably not really the main problem.
-The problem seems to be a stuck main bearing, issues with the throw out bearing, or the locker in back of the transmission that us used to convert the four wheel drive system to front wheel drive.


https://www.youtube.com/watch?v=CMkpS7SimBg


I am stuck and need some help if anyone has ideas.

Thanks,

Cr