The inconsistant idle might be caused by the throttle arm loose on the throttle shaft or the butterfly loose in the shaft.
The diaphragm on those are very floppy. It may not be installed right. Check the float for fuel absorption & adjustment. Make sure the metering rod is installed correctly.
George

Last edited by Wrenchbender Ret.; 09/14/2021 7:58 PM.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
In the Gallery Forum