Thanks for the reply.
I think I'll go with stainless though instead of the coated ones. Since these are off-shore made headers, I'm leary of the quality of the coating.
I was looking at these. Not much more money.
New SBC Chevy Stainless Steel Block Hugger Headers 350 | eBay
Also looking at these with 3/8" flanges. They are $50 more ($67 more including the shipping). I'm wondering if thicker flanges would make them a better choice and worth the extra dollars.
S/B Chevy Stainless Steel Tight-Fit Headers - Speedway Motors, America's Oldest Speed Shop