I just recently finished my 94 build with an FJ80 front axle using the FROR knuckles. While the quality is top notch, we did run into clearance issues with the leaf springs. I used a full width spring hanger from Sky's to help with the passenger side leaf spring perch, but it was still a pain to package everything. The guy that did the SAS measured his Hellfire knuckles and they were an inch taller so it might save you quite a bit of time and fab work to look at going with those over the FROR.