The clip that the accelerator return spring is hooked to on the bottom is attached by one of the oil pan bolts. I would try moving the clip back toward the firewall one bolt which should allow the spring to clear the linkage.
Phil Moderator, The Engine Shop, Interiors and Project Journals
1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes Project Journals Stovebolt Gallery Forum