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Al: any idea what your current THM400 is out of? Sounds to me like you need to tweak your governor...
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lots of responses regarding the governor(not Schoney!

) and a kit is on order from summit..thanks for the replies/suggestions/info.
Tom, th400 is out of a chevelle less than 1k miles..owner switched to a M-22..B$M holeshot converter..mild shift kit
ALbert