Cheap eBay Intakes

Ya I bought it during the 40% off Black Friday sale for my sons
street car. I ended up passing it on to a member for a fair price. The “ugly Torquer” that he got in a parts deal flowed more. I’d love to find an M1 for him at a good price.
I guess I should have done some research before I coughed up for this thing. Going to look into sending it back. Have you ever messed with the stock 4bbl intakes? Are they worth doing a gasket match on and running with a mild cam? Just wondering if they run out of steam quick, and it would be worth grabbing another manifold instead.