easy fix from the top
I've had mine off several times adjusting linkage, First off, take a piece of mechanics wire and wire the throttle handle wide open.This will bring the linkage closer to the top and easier to get to. Then take about a 12 inch piece of mechanics wire and just twist or bend it around the oil pump linkage so if you drop the linkage it wont go clear down to the belly pan. I bend the loose end of wire so it is secure up top some where. Now you will need a long flat tip screw driver ( 12 to 16 inch long ) You can now use the screw driver to gently pry the plastic hem joint off the oil pump. Once you do that then the other end of the linkage will just slide off the other end. Now when you remove the linkage the oil pump will go closed, when its time to put the linkage back on use a small wire and just hook the oil pump lever and pull back open and hold it with your wire. slide the top end of linkage on first, then gently press the hem joint back on. Once you do this a time or two it will only take you about 10 minutes to adjust the linkage. When finished un tie the throttle handle and check your work.