Do you know what your fuel pressure was? Ideal for our years is supposedly between 40 and 43 psi, according to TPIS. Stock was 37 for 86; not sure about 87. When Mad Mic was going to replace his, we checked the pressure and it already was at 42.
If you do have your heart set on getting one, get TPIS's. Among other things, they stand behind their product. I broke the vacuum nipple off mine during my rebuild and they sent me a new one plus new shell at no cost.