I'd first verify that these will work on your car. I originally purchased a set of those headers for my '68 and I can tell you that there's NO WAY they'd fit on a Camaro. They looked pretty much like those, too. I waited months to get them and then they wouldn't even kinda fit my car. The guys at Stainless Works were nice enough to let me return them.
Make sure the design has changed A LOT. They may have made adjustments after more people like me returned them. But I can't imagine the old design fitting in any automobile. Maybe a boat.
I now have a set of Kook's headers. They convinced me that the 1 5/8 are better than 1 3/4 for the reasons you point out.
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