You don't really want vacuum to go to a vac retard dizzy, maybe someone blocked the hose.
You have a later model carb on an early manifold, the carbs are different, the manifds are different,
the air cleaner is not going line up. There should be a washer between the float bowl and the plugs...
Did that thing where you take an extra head bolt and cut a groove in it then run it in and out of the head bolt holes to make sure they are all clear or something.
I think that's what the date code says.
I got the Pig in 1986 and probably rebuilt the carb right away. That was before 'Mud and even the LCML. I think I rebuilt the carb every year for the first 14 years. Then I sent it to Jim C. when I rebuilt the engine in 2004. Haven't really touched it...
Sure, the jets could be causing the rough running. Could just as easily be something else. Half of all carb problems are really electrical problems. A 60 might have the High Altitude Compensation gizmo but the 40 doesn't, so the 40 may need more base advance. Sometimes (just sometimes) there are...
for the deadline tomorrow, I might plug the vac line from carb to dizzy, advance timing as it tolerates, adjust valves to FSM specs, lean out the air mix screw and see how it drives.
Things I might consider for the future; swap the retard dizzy for a '69 and earlier Toyota vac advance dizzy...
A vacuum advance dizzy would have the diaphragm mounted to the right-hand side of the dizzy (pretty much where it would bump into the oil filter on a 2F) so that the inner plate would rotate counterclockwise with vacuum applied. Often has a little dial attached that you can use to fine tune the...
I am NOT a brake expert, nor have I read what you've read. I have run the stock '74 55 master cylinder with 4 wheel drums, with Toyota front discs then with Poser rear discs. Then added the 80 master. I have never run, nor felt the need for, a proportioning valve. Some people swear by them...
Vacuum numbers look OK for your elevation. Sometimes these engines like a bit more timing advance than the manual calls for. Some recommend closer to 17* BTDC instead of the stock 7*. Make sure it has a vacuum advance dizzy as opposed to a vacuum retard. If it's a vacuum retard just disconnect...
Around here, up in the hills, the value of a Pig is not what you can get for it but what it can do for you. We get snow, sometimes a lot of snow. When we get a lot of snow the power goes out and my Pig is the only vehicle we own that can get into town for more propane and beer. Then it is...