My 340 in my 66 developed issues :-(

Well I didn't think Id have to tear down/break into this engine so soon...

Yesterday I started my car and pulled it out the garage, let it warm up a bit then took off with the kids for a drive. I thought it was strange that when i came to my first stop the car stalled. I started it back up and had to tickle it to keep it from stalling again...then when I started to go I noticed in my rearview mirror a cloud of white smoke and I smelled the burning oil..
The car is blowing white smoke out the left pipe and also puffing out the breather on the valve cover! So I'm thinking maybe a valve guide?? I can here a slight ticking on the left side... Anyhow, I'm curious if anyone else has had these symptoms and what ended up being the culprit??

On a brighter note, if I have to rip the heads off I guess I'll go through the rest of the
engine :-)