Come back to post in a few threads.
Why did you use the green 6484244 ('73-up, think EGR) sensor instead of the correct black 6484242 ('68-72) unit?
I thought the '70-2 RA vent pipe tubes had the bend and went away in '73 (which had an angle cut on the end). Yours looks like a newer ('77-9) unit.
|