LS1 Conversion motor mounts...
Thread Starter
On The Tree
Joined: Jul 2003
Posts: 166
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From: San Jose, CA
LS1 Conversion motor mounts... Does anyone besides S&P make motor mount adapters that allow the use of stock Small Block type motor mounts??
The look simple enough to make... I just can't see paying the mega-bucks S&P is asking, when the same thing can be made for probably $10 out of steel plate. Does anyone have any diagrams/measurements to use for making some plates?
The look simple enough to make... I just can't see paying the mega-bucks S&P is asking, when the same thing can be made for probably $10 out of steel plate. Does anyone have any diagrams/measurements to use for making some plates?
Originally Posted by grooves12
Does anyone besides S&P make motor mount adapters that allow the use of stock Small Block type motor mounts??
The look simple enough to make... I just can't see paying the mega-bucks S&P is asking, when the same thing can be made for probably $10 out of steel plate. Does anyone have any diagrams/measurements to use for making some plates?
The look simple enough to make... I just can't see paying the mega-bucks S&P is asking, when the same thing can be made for probably $10 out of steel plate. Does anyone have any diagrams/measurements to use for making some plates?
Thread Starter
On The Tree
Joined: Jul 2003
Posts: 166
Likes: 0
From: San Jose, CA
Thats understanable, but my uncle is a machinist and runs a shop with every fabrication tool imaginable. So, all I really have to do is show him a diagram and in a few days I have them for free. 
Another question: for those of you that HAVE used the S&P mounts... is the motor placement EXACTLY right?? I mean is it truly in the exact same spot as a small block would be?? Do things like stock transmission mounts/driveline angles etc. all match up the way they did with a small block, or is there a lot more tweaking involved?
Another question: for those of you that HAVE used the S&P mounts... is the motor placement EXACTLY right?? I mean is it truly in the exact same spot as a small block would be?? Do things like stock transmission mounts/driveline angles etc. all match up the way they did with a small block, or is there a lot more tweaking involved?
Teching In
Joined: Mar 2002
Posts: 23
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From: East Quogue, NY
I used the S&P adapters for my swap into a '71 Z28.
Yes, they put the engine exactly where a small block would be along the "front to back" axis. If you are content with this location then the only clearance issue for that particular swap is the a/c compressor. The LS1 looks like it belongs there:
http://members.aol.com/MikeM79Z28/LS1TestFit.jpg
Given that the plates themselves have a certain thickness it could be that the LS1 would sit a tad higher than a small block, but this was not a concern of mine.
Yes, they put the engine exactly where a small block would be along the "front to back" axis. If you are content with this location then the only clearance issue for that particular swap is the a/c compressor. The LS1 looks like it belongs there:
http://members.aol.com/MikeM79Z28/LS1TestFit.jpg
Given that the plates themselves have a certain thickness it could be that the LS1 would sit a tad higher than a small block, but this was not a concern of mine.
