55.2-59 Throttle linkage question

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It's best to look at the linkage as a system before making changes. Try to make sure the link, the larger piece of steel that the rods attach to, is as close to 90 degrees to both rods as possible. This could mean moving a pivot or attachment point and changing the length of one or more rods. Bellcranks can "over center" and with a throttle linkage the result can be very fast throttle opening when it is not wanted. I've driven vehicles with this issue. Sometimes they are very hard to control.