Ok so I inquired with JEGS and this is what their customer service replied in response to a high flow cat system and engine rebuild.
Thank you for your question and interest in Jegs High Performance.
To answer your convertor question the product that offers the best fit to value is Magnaflow as they are direct fit, driver side is part number 642-93107 and the passenger side is 642-93106. We do not offer any rebuild kits but we do have individual parts to build a custom high performance engine. Once you get the engine apart, inspected and machined we can help you with pistons, rings and bearings. I would recommend the Ford racing 397-M-6250-E303K camshaft and lifter kit as it will work with all of your stock components and offer a slight performance upgrade.
Please click on the underlined products above for more information and to view the products online. You can order online at
www.jegs.com or over the phone at 1-800-345-4545 24/7. We offer fast same day shipping on in stock items ordered before 9pm EST, a “to your door” price match guarantee and 100% customer satisfaction. We look forward to your order and if you need further assistance feel free to contact us.
Thank you,
This is the cat set they recommended.
http://www.jegs.com/i/Magnaflow/642/93107/10002/-1 http://www.jegs.com/i/Magnaflow/642/93106/10002/-1
This is the cam and lifter kit they recommended.
http://www.jegs.com/i/Ford+Racing/397/M-6250-E303K/10002/-1
In my case , I'm not looking for HUGE power gains. Just a refresh while adding a little bit of additional performance. Any 5.0 Guru's wanna weigh in their suggestion?