I have been lurking for almost a year now and am getting ready to install my jag ifs in my 52 f1. The problem is that the po removed the crossmember that everyone seems to give measurements from for a "rough" center. Can someone provide me with a rough measurement from some other point.

 

I believe Oldcrowbarber just welded one onto his frame, maybe you could PM him?

 

The rearmost upper control arm mounting hole on the jag crossmember lines up with the wheel centerline. I set mine up with the centerline 1/2" rearward of the front axle snubber mounting hole.
This is how I did my trucks, not saying it is the correct position for your truck, I would mock up the cab and front fenders to confirm it works for you, because who knows how close every truck is for measurements.



I only have this side picture and I dont know if the front wheel was set straight ahead or not.

 

Thanks for the input fellas. As the po also filled most holes that are of any importance, I think I will just have to do what you said Dave and tack it in and test fit everything.