New Small Block Headers

Dan the man said

If they are costing you power, then they are probably too small. You can't compare 1 5/8" headers to 1 7/8" that's not a fair comparison. Doug's makes a great header as does tti. You have to consider the entire exhaust system not just the headers themselves.

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duh, I get it. Doug’s doesn’t make bigger ones. These were fine on my old motor.
TTI does make bigger ones, but they are far from optimal power wise. They are a compromise, I find it hard to justify them, but…not much else out there that fits my needs…good power, ground clearance, trailer loading, etc, etc