i have an 07 auto and i have 420hp/405tq now. i am looking to get a forged motor. my questions are

1. how much power can i run and keep my stock exhaust system? (i want to keep the car sounding stock)
2. how much power can i get from the saleen s/c? (with everything else on the car stock)(i have gt500 fuel pump)
3. is it worth about $500 to go with the 5.0L over the 4.6L?
4. to be added later

 

1. the stock catalytic converters are only rated around 400 hp on our cars so you are already pushing it, eventually you will at the very least have to weld in high flow cats in their place when they decide to break apart on you, happened to me twice already. When you put in high flow converters it wont sound stock anymore, so i would really say your already on the edge of what your looking for.

2. A complete stock car, your fuel pump will max out before the saleen does.

3. http://www.livernoismotorsports.com/...t.phtml?p=1002
in a lot of peoples opinions, this is the best stroker kit for sell, livernois stands behind their product 10 fold and will answer any questions you have with the install. Its only 100 dollars more than their normal stroke too.

 

depending where you live in illinois give dssraceing.com a call there great with 4.6 3v motors they bulit my nitrous short block they can tell you what cats to use,or build you a great short block!