I know this has been covered so many times but I can't find squat on the search engine. So here Goes. After putting off my 6" spring install it payed off. A buddy needs them and he is trading me 2 yes 2 14blts and a set of 8 lug wheels. Some may say that that is a crazy trade but I think it is worth it concidering I got the springs last spring for 200$. They are 56" springs so I put it off on the install list and wham a few hard to find axles land in my lap. So here is the problem. How do you tell between FF and SF 14 bolts. I have no idea what they came out of and I am popping the cover on one of them tonight. According to the axle identifier post in the Tech's page it is the Big 14b. Are all these FF or am I just getting my hopes up. Part numbers don't cross with GM /forums/images/graemlins/angryfire.gif but I know it came off a 3500 from what he said(not a dually). I am just hoping to have landed a good deal after waitting so long to convert to 1 ton after Tellico last year. Hopin to have the conversion done on it prior to April. Now all I need is the front axle. Thanks fer any info granted.