Jack, I've been using the stainless steel unit offered by the Roadster
Factory. Has held up very well compared to the mild steel headers that seem
to rust through every two years. I doubt, however, that it generates the most
power. Have not done the calculations, but have looked at cars like Mike
Jackson's and Hardy's. They have long primaries, ending in a collector way
down below the starter. My primaries are short and enter a collector about
midway down the side of the block. Haven't dyno'd, so can't say for sure
what's better. But I generally go for the reliability anyway. I'll be
interested to hear what you end up with. Regards, John Harkness
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