340 Build help please.

budget build is kind of a nebulous term. what's your budget? $500? $5000? $10 and a burrito?

no matter the coin involved it's going to come down to: compression, heads that breathe, and a cam that works with everything else. selection of the right components that work properly together as a system is key here.

how bad off your engine is to start with is a deciding factor in the initial selection of components. there's a massive dollar difference between getting away with just freshening it up and needing a crank/rods/heads, etx.