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    454+th350 strange rattle

    I have a-77 suburban with 454 mk4 and th350. Th350 has Alto Red parts, b&m shift kit, adjustable vacuum modulator, governor springs, increased line pressure, just to handle 454 torque. 454 has long tube headers, eddy performer 2-0 and carter 750, RV cam and peanut port heads, msd HEI, nothing...

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