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This is the date code on the 340 X heads on my 1969 Barracuda (SPD Dec 30th) 10 - October 21 - 21st day October 8 - 1968 Agree, disagree?

Yes

Great advice @AJ/FormS . I had forgotten to mention about the transfer slot setup. The attached photo shows the correct relationship between the throttle blade and the transfer slot. The optimum setting for the blade is to uncover an approx square opening on the transfer slot. It is a real pain...

In general, today’s gasoline burns slower than the good old stuff. As a result, the old engines like more initial advance. I’ve found that 10-12 initial works Quite well in most Mopars. However, this usually requires recurving the distributor to ensure total mech advance does not exceed approx...

Also keep in mind that some timing lights will not give accurate timing results if a MSD is installed.

Looks like fatigue damage similar to what I found in my 340. I had used standard 1484M bearings. This time I bought high performance SH875S Clevite 77 cam bearings.

The shim is not only subjected to high temps but also to the exhaust pressure pulses. .002” copper will not withstand the pulses. I use .015-.020” S/S shim stock.

Mine is down 1.6". Looks like there is a step in the hole which the plug seats against.

Yes, that is the one that is driven down to a specified depth

It is shown on Illustration Page 9-2 and is part # 86. Looks like Dorman 555-008 is the right one. Dorman HD Solutions - 555-008 Thanks for the help!!! Jim

Page 9-2, Code 9-02-17

Looking for a source for the plug in a '69 340 block at the rear bearing. I think the p/n is 1324464. Thx Jim

I dont think there are part numbers on any fan pulleys or crank pulleys. There are on alternator pulleys.

I received some pictures from Jim (RealWing) who has an un-molested 1969 barracuda 340 S with A/C and Power steering. These pictures answer some of the questions about this puzzle for the correct pulley and the way everything goes together. Take a look. Thanks Jim You are welcome. Hope you can...

May have bent the connecting rod. Check for straightness!!!!!! Jim

Make sure you use high quality bearings. The last bearings I put in my 340 were a standard quality 1484M and when I pulled it apart this year , one bearing started to show signs of breaking up. This time I've got High Performance SH875S MAHLE/CLEVITE SH875S Camshaft Bearing | RockAuto

They MUST be able to rotate freely or you will destroy the lifter and/or cam!!!! Hughes Engines has a burnishing tool you can rent I think. A honing tool will likely get caught on the oil gallery cutous. They have very specific instructions to make sure your lifters rotate easily when...