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It seems like the stock compression ratio is pretty low, I guess to allow for for low octane fuel. Being that the lowest octane available here is 87 I would think the compression ratio could be raised without much issue. It seems like it would be easy to do, just shorten the jugs a bit. Has anybody ...

Does anybody know the size of the hole in the orifice for the dizzy vacuum line? Mine is plugged up.

To set my timing I get it about tdc then fine tune it on a hill by my house. I advance it a little at a time and my speed creeps up. When it quits creeping up with advance I quit advancing. The setting is as little advance as you need to get maximum speed up the hill. I then lug it to see if it ping...

I have always wondered if it was possible to rig up something to shut the idle valves during engine braking. I thought doing so might help with the stench. I will look for some exhaust leaks

I noticed some fire coming out of my tailpipe this evening. I was coming down a long steep hill, engine braking the whole way. About 5 minutes in I noticed some orange light in my mirror. It was fire coming out of my tailpipe. If I cracked the throttle just a little it went out. The truck runs fine....

I think I have this problem too. Intermittent rough running, misfires, and low power, particularly at low rpm. It seems to fix itself which confuses things. Once it was clearly water in the distributor cap so I am going with that for now. I have the Petronix civilian conversion with the vacuum vent....

I had trouble with my carb leaking after I went through it. I found a good way to locate the leak. Dump the gas out, spray the outside with soapy water and blow compressed air into the bowl vent. The bowl vent is the thing with the screen in it right in the middle when looking down from the top. All...

Runs great with clean carb. Must have been something in it.

I took the front carb apart, cleaned it and put it back together and everything is fine again. That is the first time I had a carb problem that was intermittent.

My carb is back together and I will try it in the morning. Except for the extra orings on the idle jets, there was no obvious problem. JIm L's instructions were great. I would only add one thing: Until you get your float level right, use the old top gasket; save your good gasket until you have the f...

Thanks for all the help. So mine had o-rings on the idle jet and has run fine until recently. I have taken them off. The o-rings onthe idle mixture screw (small type) are missing. I will put some there. My front is small screw and my back is large screw. I don't have a good picture of the large scre...

I am sorting out a misfiring cylinder on my truck and suspect it is fuel mixture related. I removed the jet cover and pulled the jets. The slow-running jets (1-40-28, 700.1.08.405.1/60) had o-rings in their seats. The drawing in the parts book does not show an o-ring here. Does anyone know if there ...

Changed the plug wires, the cap and the rotor. I am getting good spark to all four, but I am getting a misfire on #1 under load. I have tried two different spark plugs with gap set correctly. I pulled the valve cover and the valve gaps are normal. I am thinking it is a carburetor problem, mostly by ...

When I was young we use to set the timing on cars by advancing them until the engine knocked under full load then backed it off just a bit, like 2 degrees. Then we tried to start it and if it cranked hard we backed it off a bit more. Has anybody tried this? Does anybody understand why the static tim...

I think I may have found the problem. I took the spark plug leads off to ohm them and they all ohmed the same at about 1 kOhm, but I noticed some damage on the #1 lead where it snaps into the wire holder at the top of the engine. I wrapped it with electrical tape and everything seems back to normal....