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Old 05-14-2005, 01:26:00 PM   #1
demolitionman13
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1970 Camaro Engine Frame Mounts

I have the following frame mounts in my 1970 Camaro, but the SBC will not bolt in. I bought this car without an engine, and these were in the car. Left Side 3964890, Right Side 3980930. Could anyone tell me what these mounts are for, and if I can use them to install a SBC? Thanks for your assistance.
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Old 05-14-2005, 02:24:00 PM   #2
TopRat
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demolitionman13,

You have the correct frame mounts for a small block V8 in a 1970 chassis, the only other mounts offered in 1970 were for the Z/28 and L78 cars which were about 3/8" lower. Your small block should drop right in with the proper engine mounts on the block.


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Old 05-14-2005, 03:11:00 PM   #3
demolitionman13
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Thanks for the reply. The engine side mounts I have are just alike, and 1 has Part Number 2267 on it. I am installing a 400 and I bought 1 new engine side mount for a 350 car and it is just like one I already had. Does the 400 make a difference? The engine falls right into place on the passenger side, but it is about 1 inch away from the hole on the driver side and I can't get it to line up.
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Old 05-14-2005, 03:37:00 PM   #4
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Your enging being a 400 should not matter, externally it is the same as a 307, 350 etc. I can give you the original part # for the engine mount you need, maybe your local parts store can cross reference the number.

1970 Chevrolet parts book lists the mount as

Nova, Camaro (307,350) (exc. Sp. H/per.) ....3964895

Hope this helps....Alex Martindale

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Old 05-14-2005, 04:02:00 PM   #5
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Old 05-14-2005, 04:13:00 PM   #6
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Ok, Thanks. I will try that.
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Old 05-14-2005, 11:35:00 PM   #7
70-SS/RS-L78
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I am not sure how far off your mounts are but the Second Gen Front Frames
Sections have a tendency to sag. I have had to spread more then one to
to get the engine bolts to line up. You can tie the side rails down and lift the
Center of the frame or just put a Porta Power Ram between the Control Arm
mounts


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Old 05-17-2005, 06:21:00 PM   #8
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Is there any way I can measure to see if the frame is sagged? I tried it again today, and I am about 1/2 to 3/4 of an inch away from getting the engine to bolt up, and it seems like the engine is sitting really high. When it is "almost" bolted in.
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Old 05-17-2005, 11:05:00 PM   #9
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Quote:
<font face="Arial,Verdana" size="2">Originally posted by demolitionman13:
Is there any way I can measure to see if the frame is sagged? </font>

One way to tell is if you have any alignment shims in the upper control arms. If only a few or none it needs to be spread. When I spread them I go over a little because it will settle about 1/2-1 degree on camber and also enough to put some shims back into it for camber adjustment and to bring the caster to at least 2 positive. This should also line the mounts back up where they need to be...
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Old 05-18-2005, 12:09:00 AM   #10
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There's also 2 different engine mounts which bolt to the side of the block, a short style and a tall style. This may be what you're trying to fight as well. I believe the tall mounts go on the short brackets, so you'd need the short engine mounts.
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Old 05-18-2005, 10:38:00 AM   #11
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Thanks for the help. I think I am going to try to spread the frame today. I have noticed that it doesn't have many shims in the upper A frames. I am pretty sure I have the right engine side mounts. I have looked at those other mounts and they are a lot thicker than what I have. I also went to the parts store and bought 1 for a 70 Camaro with a 350 and it is just like the others that I have been trying to use. Thanks again for the replies.
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Old 05-18-2005, 10:44:00 PM   #12
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Well, I followed the advice, and the frame did need to be spread. After spreading the frame the engine went in just like it should. I would have never figured this one out on my own. Thanks for your help.
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Old 05-22-2005, 08:21:00 AM   #13
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By any chance did you get the frame measurement’s before you put the engine in?
It might be useful for the next person with this problem. I always forget to do it until
after the engine is bolted in and I am just too lazy to take it back out….




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Old 05-23-2005, 05:42:00 PM   #14
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Quote:
<font face="Arial,Verdana" size="2">Originally posted by demolitionman13:
Well, I followed the advice, and the frame did need to be spread. After spreading the frame the engine went in just like it should. I would have never figured this one out on my own. Thanks for your help.</font>

That's great. I'm sure you already know this but after you drive it some and let it settle the front end will need to be align'd to keep away uneven wear from your tires...

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Old 05-23-2005, 10:56:00 PM   #15
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I didn't actually measure the frame width, I was measuring the engine mount holes in the frame mounts. I spread it to a little over 17 inches from outside to outside, then let it settle. Then, I just decided to try setting the engine back in, and it worked. Hopefully this will help someone else on down the road. Again, thanks for your help.
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