They where made by Madman & Co. Racing, please see picture at post 13 on the link given, they are identical to your except some one cut an alternator hole on yours, the company is out of business now. As a side note actually you got exactly what you asked for the first time, you asked what make and model they fit, which is what I told you. They fit GM LS style engines in what ever you want to put them in, there is no make they go in, they go in any make car you can physically fit the LS engine in. There are many different shapes, many homemade or copied, the important issue is what engine do the bolt holes and water passages fit, and that is the General Motors LS style engine.

Chevy LS series motor front motor plate, unknown manufacture, cut alternator hole

References:

http://www.ebay.com/itm/Competition-Engineering-3995-Front-Motor-Plates-Chevy...

Reason:
This one is shaped differently from the reference link. Could you find the exact model match for the item?

They where made by Madman & Co. Racing, please see picture at post 13 on the link given, they are identical to your except some one cut an alternator hole on yours, the company is out of business now. As a side note actually you got exactly what you asked for the first time, you asked what make and model they fit, which is what I told you. They fit GM LS style engines in what ever you want to put them in, there is no make they go in, they go in any make car you can physically fit the LS engine in. There are many different shapes, many homemade or copied, the important issue is what engine do the bolt holes and water passages fit, and that is the General Motors LS style engine.

References:

http://ls1tech.com/forums/drag-racing-tech/1359409-motor-plate-info-post-pics...