I bought mine at NAPA too. Long time ago. I don't have part numbers on them either. Emery, check with your NAPA counterperson and ask the poundage rating of the Larry supplied part #. Then up it 50 or so lbs for the wing. I have a small wing, I had to modify a set but they work great. You don't want to have to pull real hard to bring it down. I used a 1/2 inch ID shaft collar and tapped the set screw hole to accept the stud at the end of the cylinder. The top just screwed to the old original tip.
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