Hi everyone! so my father and I recently installed a new diaphragm clutch in our mustang. The clutch is a Jegs street performance clutch kit. we replaced the flywheel as well which was a direct replacement. Once we got everything installed, we found the the clutch was not disengaging, and the only way to get it to disengage was to preload the throw-out bearing on the clutch springs(only for testing purposes). We found the clutch linkage needs probably an extra quarter of an inch of throw to be able to work correctly. We aren't completely sure what's causing this issue, I'm assuming it must be excess play in the z bar, but it has fresh bushings so it doesn't make a lot of sense. We are now considering installing a hydraulic clutch conversion kit, but the only options for the t4 are at least 650 dollars. I found there is a version for the t5 transmission that is about half the price. I was curious to know if a t5 kit could work with a t4? or if anyone has suggestions on the clutch issue by all means let me know! thanks!