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Any Suggestions or Ideas?

WFHDANB426

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OK, I went out to the barn and drug out a bare 340 block. Please ignore the cat hair on everything! It's much better that mice and rat crap! Assuming you can remove the oil pressure sending unit next to the distributor, you can take a piece of wire and run down the hole. It should hit the plug at ~7 1/2" from the block top surface. If it goes in 8" or more, odds are the plug is missing. See photos below. First photo is were to insert the wire. Second photo: I put a read circle with the wire at where the plug is located and in the last photo I circled the hole below the rear main cap where the plug is installed.

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That's great info and you could create a new post about an easy way to check that the plug is installed because if an engine builder pounds that plug out before hot tanking the block and then it don't get back in then the oil isn't forced to go through the filter before it circulates.
 

WFHDANB426

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That's great. I really appreciate your help!!!!
Anytime! If you wanna help me you can go to youtube and listen to my three Cuda songs and subscribe to my youtube channel. Artist search name: WFHDANB426 And I was talking to Brandon from the Mopar Guy song and I told him that we need to make more Mopar car songs. I'd like to buy a Hemi Cuda someday too. Maybe a millionaire will like my songs someday and give me a Hemi Cuda. :)
 

sir_veza

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OK, I went out to the barn and drug out a bare 340 block. Please ignore the cat hair on everything! It's much better that mice and rat crap! Assuming you can remove the oil pressure sending unit next to the distributor, you can take a piece of wire and run down the hole. It should hit the plug at ~7 1/2" from the block top surface. If it goes in 8" or more, odds are the plug is missing. See photos below. First photo is were to insert the wire. Second photo: I put a read circle with the wire at where the plug is located and in the last photo I circled the hole below the rear main cap where the plug is installed.

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Awesome! I really appreciate your help. Huge help.
 

WFHDANB426

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CANADA
Awesome! I really appreciate your help. Huge help.
Anytime! I got my 70 340 Cuda in 1978 and I've owned many more Mopar's, circle track raced Mopars, been an auto mechanic and a Millwright, etc so if there's a problem with a Mopar just ask away. We used to drill the passenger side oil gallery out to put a copper tube in to restrict oil loss around the lifters, we used dual pickup oil pumps and all kinds of stuff.
 
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