T-5 has held up fine so far, no problems ( knocking on wood), I didn't build a pressure box, I have a blow thru carb with a bonnet, and I just modified the carb to handle boost internally and plugged most vacuum holes, so that there are no leaks. Most people don't believe me when I tell them, and I would think the same, until you looked under my hood, then the looks of bewilderment start
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