I will try to keep this short. 1978 fj40 stock axles. STock body height. I am doing a SOA w/ rear fj60springs on the front and rear both ends flipped as to extend the WB. Stock 2f, sm420, rock box, 3 spd case, with shackle reversal. Sittin on 38". If I set the axle at the same height as the rear axle and I point the diff at the output of the t-case I come up with a leaf perch offset from factory of 18 degrees not factoring the knuckle turn of 3-5 degrees for my 38's. I have read of up to 14+ the 3-5 on the knuckle but degrees but 18 to start seems alot higher. That would make 18+3-5= 21-23degrees. I do know I may have to relocate the fill plug. Also some say to drop the diff housing from directly pointing at the t case output a couple degrees (some say 2-3, others say 6 degrees) to compensate for drive line angle changes under acceleration. so set leaf perch's at 16 degrees? I do plan on running a DC shaft. I could try to post pics but I am not sure it would help. Could I be doing something wrong?