Originally Posted by crw9911
I Am Looking To Keep It Looking Stock But Have A Real Beast Inside Maybe Pushing Top 13's If Possible
In a word, turbocharging.
A well-tuned, appropriately sized turbo will work nicely on an internally stock GSR motor. And as your budget grows, you'll have the basic stock to build a 300+ hp motor.
Where are you located?
Is California smog legality a concern?