All 2F pumps will work fine. The question is about the pump spacer. 1986 pump came with a spacer. Did you reuse the spacer? This would be incorrect if you did.
From @3_puppies
"easy way to figure if it needs a spacer on the fuel pump
3 lines at the pump needs a spacer, 79 and newer in stock form
2 lines at the pump no spacer needed, 78 and older in stock form"
From @3_puppies
"easy way to figure if it needs a spacer on the fuel pump
3 lines at the pump needs a spacer, 79 and newer in stock form
2 lines at the pump no spacer needed, 78 and older in stock form"