Truck Frame 
Motor Mount Help
Thread Starter
Teching In
Joined: Dec 2006
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Motor Mount Help I need some help with my motor mounts. My truck has a mustang II front suspension with sbc mounts and I made a set of S&P style adapter plates out of 1/4" steel. For some reason the holes won't line up. I can get a bolt in one side, but the other side doesn't fit. I have added 3/16" shims to each side but still no luck. Does anybody have any ideas?
Thanks,
Brian
52 Chevy truck with 98 LS1 and 4l60e
Thanks,
Brian
52 Chevy truck with 98 LS1 and 4l60e
There are two SBC type of Motor mounts..
1) Short and Wide, which has a Inside Width- 2 5/8" and Height Base to Bolt Center- 1 3/4"
2) Tall and Narrow, Inside Width- 2 3/8" Height Base to Bolt Center- 2 3/16"
Question, what is the width of the frame mount. There is about 1/4" different between the two mount in width and 7/16" in height.
maybe you have the wrong mounts for your mustang II setup ?
Good luck..
1) Short and Wide, which has a Inside Width- 2 5/8" and Height Base to Bolt Center- 1 3/4"
2) Tall and Narrow, Inside Width- 2 3/8" Height Base to Bolt Center- 2 3/16"
Question, what is the width of the frame mount. There is about 1/4" different between the two mount in width and 7/16" in height.
maybe you have the wrong mounts for your mustang II setup ?
Good luck..
Thread Starter
Teching In
Joined: Dec 2006
Posts: 10
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It looks like I have the short and wide mounts. They should be the correct mounts for my suspension because I bought with my suspension kit.
The width between the frame mounts is 16 7/8".
Does anyone else have a suggestion? This is getting frustrating.
Thanks,
Brian
The width between the frame mounts is 16 7/8".
Does anyone else have a suggestion? This is getting frustrating.
Thanks,
Brian
Who fab'd up the engines Frame mounts.. is it possible that they didn't fab them up correctly ? From the pic, it looks like the mount is hitting the frame mount, is that the case ?
What happens when you take out all of the shims and spacers ?
What happens when you take out all of the shims and spacers ?
Thread Starter
Teching In
Joined: Dec 2006
Posts: 10
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The frame mounts were part of the mustang II setup. They bolt to the crossmember, and all the holes are pre-drilled. All the holes lined up, so I don't think that is the problem. I bought the mounts that bolt to the block from the same place. The guy told me they were the right ones for my setup.
If I remove the shims, the holes are a little further off. I suppose I could keep adding shims until it lines up, but I don't want 1" thick adapter plates on each side.
The driver's side framerail was bent slightly upward just in front of the cab when I bought it. I had it repaired, but it's I doubt it's perfect. Would a small tweek in the frame throw it off that much?
If I remove the shims, the holes are a little further off. I suppose I could keep adding shims until it lines up, but I don't want 1" thick adapter plates on each side.
The driver's side framerail was bent slightly upward just in front of the cab when I bought it. I had it repaired, but it's I doubt it's perfect. Would a small tweek in the frame throw it off that much?
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It could... did the subframe mesaure turn sq and level ? I would call the manufactor of the subframe and talk to them about your problem... maybe they can send you a new frame mount or setup...?
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Teching In
Joined: Dec 2006
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Well, I took another look tonight, and I think I can flip the mounts upside down like the ATS mounts and make it fit. I will still need the shims, but at this point I can live with that.
I will test it this weekend and give an update afterwards. If it works, I will probably make another set of adapter plates out of 1/2" material to clean things up and get rid of all the shims.
Thanks again for all the advice. I'm sure I will need a lot more when it's time to finally fire it up.
I will test it this weekend and give an update afterwards. If it works, I will probably make another set of adapter plates out of 1/2" material to clean things up and get rid of all the shims.
Thanks again for all the advice. I'm sure I will need a lot more when it's time to finally fire it up.