For quite a few years, I've seen many brass floats leak. I test each one by submerging in water at about 200 degrees. I scrap every one that leaks, as I have not had good success with re-soldering the seams. These floats are 60 plus years old. The aftermarket brass floats are noted to be unreliable.
Pontiac switched to nitrophyl (plastic) floats in 1968, likely for cost savings. I have found the plastic floats to be more reliable than brass.
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'64 GTO Tripower Hardtop (Wife's Car)
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