Will GM 200r4 work with factory floor shift location?

You might be surprised at how much engine tether is in that upper hose.
I saw the other thread stating exhaust already disconnected.
69 model will have the wafer or biscuit type mounts. There isn't as much movement in those as in the spool mounts but the spool type are failsafe. If you break or unbolt both the biscuit mounts and the engine will fall back, destroying the distributer or worse. Be careful.