I have FJ80 fronts on the rear of my wife's 3rd gen; not the same truck, but since I have also run ProComps on the rear of my 2nd gen before it was toasted, I can compare them.

There isn't a comparison between them. Run away from ProComp springs unless you like them sacked, saggy and harsh. The FJ80 springs ride wonderfully as if soft, yet they carry weight well. Fantastic springs. Christo was correct (as he usually is - he is a valued member of our club).

No idea on how much lift they will provide you, but they rule with most 2nd gen guys.

-Bill
'87 4Runner w/ '96 5VZ-FE, 'Red Chili II'
'97 Taco XtraCab 3RZ-FE, 'BlackBean'
TLCA # 13257, Rising Sun 4x4 Club Land Use Coordinator
"He who stops being better stops being good." -Oliver Cromwell