Bent pushrod!!! Help please!!

[commercialcobb]

I didn't do the engine only the car. I have had a tapping sound from the driverside bank for a while now and finally decided to do a valve adjustment. When removing the valve cover screws, they were so loose (explains oil leak on top of the header) that it took ZERO effort or less to unscrew them. Was not impressed at that point!! Pulled the valve cover and I found (Pic #1) something I wasnt expecting!! I have had smoke and OIL splattering up from the collector from that cylinders exhaust pipe that has been filling the engine compartment and cockpit. I now realize I have been running on 7 cylinders for some time and it was the intake cylinder that had the bent pushrod. I am assuming that is somewhat good because at least any pressure in the cylinder was realesed through the exhaust as opposed to combustion being strangled inside the cylider bore! Now under close examination I have found little damage to the the roller/rocker.

I have several questions if you would please help me???

1. What type of damage have I done getting smoke from that cylinder that wasn't getting fuel??
Is that oil getting sucked in through the intake valve via vacuum opening the intake valve and burning inside the exhaust header??

2. Why did that rod come loose?
Poor adjustment or not properly locked by the set screw??

3. (Photo #5) Why are my pushrods (most of them) getting chaffed by the rod guides up to .06in??
Wrong valve guides or adjustments are wrong allowing the rods to chaff on the guides???

4. Do I need to pull the intake and check the lifter for damage??
Has the lifter and/or cam been damaged by the lifter coming down whenever it wants and getting smacked by the cam??

4. What do I need to do next?
Please help me, I have spent WAY too much money on this motor to loose it now!!!!!!!!

Thanks for any and all help!!! I am sorry about the photos, they are from my phone....

Thank you, Thank you, Thank you!!!!!