If you are that worried, make your own. Mount plates can be had for 20 bux specific to the LS engine. Energy suspension has poly mount kits for specific sized tube. It require more time, but if you have the means, it would be way cheaper in the end. I bought Sanderson headers, am just waiting to get a transmission, and alternator to make it work together. Headers steering and alt seem to be the main clearance points. Just my .02. Good luck either way!