Sweet rig! I have been working toward doing a 3-link with coilovers on my YJ with a 3" front stretch and have a few questions.
1. What leaf spring lift were you running before the front link/coilover /stretch?
2. What is the top mount centerline height above the top of the frame?
3. How far away from the outer edge of the frame is the top mount centerline?
I have 12" Radflo 2" emulsions with 14-250 mains and 10-100 tenders. I plan to replace the tenders with 12-110's. I am very interested in the dimensions of your front hoops. The front axle is a stock YJ D30 with TJ shafts and 760 joints. My top link is using Teraflex large joints and 1.75" DOM. For lowers I will be using JK lowers. Mounted straight off the back of the tube, the front lowers will get me the 3" stretch. If it doesn't work out with those, the rear JK lowers in the same location will put the axle exactly where it sits now. Looking forward to your reply.
1. Before the links I was running soa on stock leaves rear and 4.5"RE springs w/MORE SRS up front.
2. Its about 1.25" above and the mounts are right in front of the skid where the frame starts bending up.
3. The joint is basically but up against the frame since the bolt hole is raised above the frame.
For the springs rates I'm currently 200/200 with tenders opening 1" at droop and planning on going 150/200 to drop the rate and get rid of the tenders. For your setup swapping to a 110# spring instead of the #100 will actually raise your rate and make you need the tenders even more. You need to lower the overall rate to get rid of the tenders. How's the transition from 76# combined to 250# when you hit the dual rate? I figured it may be a bit abrupt. So I'd run a softer lower spring and use the dual rate stop to set the felt stiffness. Either way I'd use what you got on had to see what actual weight it has on it and go from there.
My front shocks are mounted off the inner C and the towers are 18" tall mounted to basically the bottom of the frame.
I'm unfamiliar with JK anything but make sure any tabs you use are 2 5/8" wide so down the road you can run standard joints or 1.25"heims in DOM lowers. Also watch the tire clearance if your running the lowers straight under the frame. That was a main reason for my goofy trick lower link mount on the driver side.