What is the most cost effective small block gm crate engine I can get 300hp out of with- headers and a descent intake? And where in the world can I get purchase one and not get raped? Dealerships suck.

I am a SUPER novice when it comes to putting a decent package together for my 51 3100- camaro underbelly front and rear.

Motto: Build it myself, or ride the bus- Dealerships can kiss my cahones.