When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I have a 300ex(same frame) it runs great with a 350x engine. A stock 300ex won't touch it. The SuperTrapp should help,but Powroll sells an exhaust system that might work better because it is built to fit this particular combo. It is about $350.