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Edit: Got tree'd on the answer...
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I was thinking that the 318/340 mounts were the same and the 360 mounts were different.
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I was thinking that the 318/340 mounts were the same and the 360 mounts were different.
driver side 340/360 are the same...318 is different
Quote:Ok, I knew there was a difference somewhere, been using a motor plate for a number of years now and the details have escaped me.Quote:Quote:
I was thinking that the 318/340 mounts were the same and the 360 mounts were different.
driver side 340/360 are the same...318 is different
X2^^^
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99% of the normal auto parts stores only carry one motor mount for small block Mopars and it for the 318's. At least in these parts any way…
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Yea, 318's might work, weird, after all it is a "340 Resto Block" you'd think they'd at least get the easy stuff right...
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I have 340 mounts (no fit) aren't 67-72 318/360 mounts (the steel brackets) the same?
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I have 340 mounts (no fit) aren't 67-72 318/360 mounts (the steel brackets) the same?
the mounts on the block are different with on the driverside for some weird reason while passangerside they are all the same.
273/318 has a wider bracket
340/360 has a narrow version from my memory. seems like the only mounts/brackets for the later spoolmount system that can be found in partsstores is the wider 273/318 version and with 318 being the most common engine it sort of makes sence,since a simple nut or a few washers can be used as a spacer to make the wider brackets fit the narrow mounts on the 340/360block.
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YOU HAVE B/E MOUNTS PICTURED TRYING TO ATTACH TO YOUR BLOCK,THEY WOTN WORK WITH A-BODY, STEELS AND RUBBERS ARE DIFFERENT.
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If you use the correct mounts and insulaters they work fine.We done many resto blocks and never had an issue with the block bosses.Keep in mind the mounts must be the correct ones for the K-member as well.
Quote:Ok, when you said lug I was thinking the lug on the block was too low,,nevermind
This is the bracket I just received (supposed to be a drivers side 67-72 273-318 mount).
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Get some flat stock and weld a new ear to that bracket to match the lug on the block. Very easy to do.
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Get some flat stock and weld a new ear to that bracket to match the lug on the block. Very easy to do.
Sure, always an options as a last resort, but with all of the posts on this thread that say "Oh no problem, just use "X" mounts, they work fine" I'd rather find one of those and bolt it on.
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Ok, let's start over here, a lot of confusing info has been posted on this thread.
Some say a 360 bracket will work. if so what year & model combo 360 bracket am I looking for (or 318 for that matter)?
If a 360? When did they ever install a 360 in an A-body with biscuit style engine mounts? They didn't, one year only 360 was used in A-body cars and that was 1974, and then the A-body used spool style engine mounts. I know for sure a 1971 style 340 mount will not fit, the bracket is too narrow to bolt up.
So which OEM mounts will fit my resto 340 engine AND my 1971 A-body biscuit style K-member?
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Ok, let's start over here, a lot of confusing info has been posted on this thread.
Some say a 360 bracket will work. if so what year & model combo 360 bracket am I looking for (or 318 for that matter)?
If a 360? When did they ever install a 360 in an A-body with biscuit style engine mounts? They didn't, one year only 360 was used in A-body cars and that was 1974, and then the A-body used spool style engine mounts. I know for sure a 1971 style 340 mount will not fit, the bracket is too narrow to bolt up.
So which OEM mounts will fit my resto 340 engine AND my 1971 A-body biscuit style K-member?
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Here are the dimensions. The bracket shown is a 67-72 318 mount (AFAIK). It is wider than my 340 mount and would fit the resto block if the rear ear hole were higher.
The passenger side mount fits the drivers side boses but the holes for the rubber mount would be located in the wrong place. I suppose using another passenger side bracket with new holes drilled to put the rubber mount in the correct location would work.
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Here are the dimensions. The bracket shown is a 67-72 318 mount (AFAIK). It is wider than my 340 mount and would fit the resto block if the rear ear hole were higher.
The passenger side mount fits the drivers side boses but the holes for the rubber mount would be located in the wrong place. I suppose using another passenger side bracket with new holes drilled to put the rubber mount in the correct location would work.
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Here are the dimensions. The bracket shown is a 67-72 318 mount (AFAIK). It is wider than my 340 mount and would fit the resto block if the rear ear hole were higher.
The passenger side mount fits the drivers side boses but the holes for the rubber mount would be located in the wrong place. I suppose using another passenger side bracket with new holes drilled to put the rubber mount in the correct location would work.
Quote:. He's already replied in the thread.
PM joesixpack - he has plenty of pictures and knows exactly what is supposed to be on which engine/body combo.
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PM joesixpack - he has plenty of pictures and knows exactly what is supposed to be on which engine/body combo.
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I think I've solved (part of) the problem. The Mounts I bought off ebay the other day (said to be from a 1972 318 Duster) arrived today. The bracket shown on the right fits the drivers side of my Resto block and I believe the two motor mount holes are in the correct (forward) location for my stock biscuit style motor mount and 71 A-body K-member.
I have several other sets on the way from a couple sources so that I can do further comparisons. Interesting that the small block mounts varied so much over the years, apparently for no good reason?
I'll be trial fitting my engine to the K-member tomorrow to confirm. What I am still trying to determine (for certain) is which original application this bracket is from (year/model/side of engine, etc.) so that we can help out the next guy should this one work. If it is from a narrow selection of years/models I'll probably get them reproduced for the heck of it.