Get a budget short block from Texas Speed or someone like that, have your heads ported, and upgrade to an LS6 manifold (if you don't already have one).

 

Marcus will treat you right

 

I'm amazed that only 2 other people said this but... DO you drive without insurance? I mean... this would be a fantastic opportunity to get yourself a NICE motor through insurance for whatever your deductible is.... I mean, you pay monthly to have it so.... why not use it?