I don't know who told you the stock manifold won't work, but for a mild build they most definitely can.
As mentioned mine makes around 800-825hp on stock 1 7/8" outlet manifolds. For a mild build and low RPM they are a perfect fit for the job.
I was told they wouldnt work due to blocking spark plugs and clearing the steering box. But im really happy you posted on this, my brother is impatiently waiting to see your turbo kits come together. (I think it was you doing them at least. Always told him "theres an ugly B body that runs like a damn Animal with boost through a 360" now after watching what videos he could find he wants to go the boosted route also lol. Killer car man. What size piping would you reccomend for the hotside? I was think 2.5" but not too sure.
