Re. PCV, if you have the usual setup with it in a valve cover (mine is the old style at the back of the intake), an easy test would be when you come to a hill like this, stop and pull the valve out of the cover but keep it plugged into the hose, just hanging free.  Then go down the hills and see if it is smoking less.  Could be oil mist sucked in through the valve because of a missing or bad baffle in the valve cover or excessive oil mist.

Sure, it might be guides, seals, intake or a combination.  But I like free and easy tests.   

Pat

I would take the plugs out and use an oil can to put about 1-2 tablespoons of Marvel Mystery Oil down each cylinder and crank over by hand.  If it feels okay, I'd put the plugs back in and hook up the wires.  Make sure the battery is good - maybe even hook up jumper cables to a nearby car if it's convenient.

But the main thing (for me) would be trying to get as much of the old gas out as I could.  Not sure of the best way of getting it out of the lines and pump, but at minimum pull a lower screw on each float bowl to drain out any that's in there.  Easier if you just have one carb.    Might want to consider rebuilding the carb(s).  Then put some fresh gas in each bowl through the vent for an easier start.  I found a clear ketchup-type squeeze bottle at Harbor Freight, I think, that I keep a small amount of gas in for this purpose.

After it's been driven a few miles or so to make sure all the old gas is gone, I'd change the fuel filter just in case.

Pat

These show as in stock from Offy but 200 bucks.  Don't know if the center rib would cause problems or not.

Pat

https://www.summitracing.com/parts/ofy-5832

https://www.youtube.com/watch?v=eTT3b-Jns9w

 

The first time I watched this and saw it was blurred out, I thought it was two cops loading up a dead body they found, to take to the morgue.  I thought, "Ugh, this is kind of dark.  Why would Heo post this?"

Pat

Probably the starter given the bearings falling out but in the meantime I'd be verifying I could turn the engine over by hand, either with a socket on the crank or just by turning the fan and holding the belt tight.  If not, pull the plugs and try again in case hydrolocked.

Pat

Don't the bushings just limit total advance?  So if you switched bushings, I think it would still be 3 degrees advanced at idle but have less total mechanical timing.  I agree - just set the initial back to where you had it.

Pat

I haven't looked at his videos for a bit, but some of his original videos were of him running his V8 Maverick on a lawn mower carb.  Showed him driving around normally, stopping, starting, etc. and cruising up to 70 mph, then getting out of the car and popping the hood to prove that was what was on there.  But what he discovered was the tiny carb setup actually ran rich (the opposite of what everyone claimed it would).  So he made the "cheater" which was a circuit board and air valve coupled with I believe an AFR probe and his custom software, to pull in extra air (through a filter) as needed below the carb to lean out the mixture to what it needed to be.

That was my understanding of his videos but like I said, I haven't checked in for awhile and just watched a few casually.  But yeah, he seems like a smart guy.

Pat

Love it! 

Pat