I have a 57 392, after getting it together and in the 34 I had a plug left over from the machine shop that bothered me. I took the motor back out after searching and discovering that there is a second plug behind the drivers side plug at the back of the block. When I removed the first plug sure enough you can see the oil galley. The problem is I see no threads for a threaded plug but there is a shoulder. Does it take a soft plug and what size? You Hemi gurus could help us novice guys with a good description of back there. When I did a search I could find little info. Thanks in advance guys.
If you're talking about the one behind the dizzy(tword the front of the engine side), there are/were threads. People often drill .050 holes in the plug to oil the cam/dizzy gears before screwing it in.
This is what I'm talkin about, knowledge on here. You young guys gotta know us old guys eyes ain't what they used to be, I could not see the threads, no way, no how, but after you told me I checked with a pick and could feel them, the plug is in and anyone that searches this item will know about the plug, thanks a bunch.
The 331 is the same. That plug has to be in there; otherwise, no oil pressure As it turned out, the 331 short block that I bought did not have this plug in place. The plug at the rear of the block was installed tho', so a guy would never have noticed it. If it weren't for reading about this on the HAMB, I would have never known, and been in big trouble. 1st pic; looking through the rear hole in the block and into the oil gallery. 2nd pic, looking down into the dist well. Small mirror showing 3/8" NPT plug in place. Use some pipe thread sealant/compound on it.
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