I saw your post in the other section and I've been researching. I BELIEVE that you need a broader range guage (0-600). I think 340 is actually low. I BELIEVE 400 is around normal. You won't come close to 600 or you'll meltdown. I'll get more info for you.
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Julian
'74 Super
"If you are under control you're going too slow" - Parnelli Jones
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