Bet few if any knew. Very simple pieces right? We have all thought they were simple enough to make ourselves, right. You can't get them wrong....right?
If you look closer, you will see that the plate has four holes (in a perfect rectangle) that bolt directly to the LS Engine. They also have one hole that goes through the Factory SBC or BBC engine mount and into the LS Block.
The remaining two holes in the SBC or BBC mount, bolt to threaded holes in the plate.
Did you know you can bolt it in......
This way (single bolt on the SBC or BBC mount at the top)
http://www.autopartsdb.net/assets/im...g/A/AT1003.JPG
Or this way......(single bolt on the bottom)
http://www.welderseries.com/blog/wp-...%20(Small).JPG
So what's the big deal right?
When you install the plates with the two bolts to the top, the engine sets a little over 2" LOWER than the other way.
This and all of the different heights of factory engine mounts and stands may explain why it seems so hard to get headers, oil pans, steering boxes and other things to fit in these swaps.
The solution,
1. Find out what the product (headers, oil pan, etc.) was built around before generating a headache.
2. Read the instructions on the plates.....if there are any?
REMEMBER: THIS HOBBY IS SUPPOSED TO BE FUN, LET'S KEEP IT THAT WAY.