Welcome to the forum.
The schematic you are looking at is for an '84. You should be looking at one for the .87 Aspy. There are differences.
Also, that looks like an aftermarket pump. May be wired differently than an OEM.
Also...and this is a big one...the '87 fuel system is one year only. NONE of the parts are interchangeable with any other year. Tank, petcock, hoses, filter, pump and carbs, the whole system, different.
The schematic you are looking at is for an '84. You should be looking at one for the .87 Aspy. There are differences.
Also, that looks like an aftermarket pump. May be wired differently than an OEM.
Also...and this is a big one...the '87 fuel system is one year only. NONE of the parts are interchangeable with any other year. Tank, petcock, hoses, filter, pump and carbs, the whole system, different.