Cash,
I printed out the ingredients of 4 different engines on 4 different sites.
331 claimed 365hp/385tq From
www.f-p-s.com
351w claimed 420hp from
www.proformance.com
306 claimed 400hp/400tq from
www.keithcraft.com
351w 420hp "cobra" from
www.chevystreetperformance.com
i'm thinking 400hp will be more than enough for the time being! Of course it's never enough! haha