edelbrock sp2p... will I regret it?

The SP2P was Edelbrock's attempt at an economy 4 barrel manifold. The runners are tiny compared to stock. Even smaller than a stock 2 barrel intake. If you are building your engine for economy, then you will not regret it. If however you want any kind of power, regret will likely come into play. The Performer or a stock 340 intake is a much better choice.