Novak has them for a FSJ. Call or email them. See response to my email to them:
"Yes, we do have a fuel system kit available for the '86-'91 Grand
Wagoneer's. If your LS engine already has a fuel pressure regulator on the
fuel rail, then you would need the non-regulated kit # FSK-JW3NR, $329.00.
If your LS engine does not have the fuel pressure regulator on the fuel
rail, then you would need kit # FSK-JW3, $348.00. Because we do not
currently have them on our website, you can order your fuel system kit by
either calling our Sales Department, or if you would rather pay via PayPal
then I can assist you via email & simply send you a Payment Request in
PayPal. Let me know if you would like me to help you place an order, or if
you have any further questions or concerns!
Thank you,
Easton @ Novak, Inc.
www.novakconversions.com
Main-(435)753-2513
Sales-(877)602-1500