[DanEC]

Sure, you can easily crank the suspension up an inch or more with the coil overs. But when you do that the trailing arms will rotate the entire, rear Jag suspension assembly forward on its pivot and the tires towards the front and the point of minimum tire clearance which are the fiberglass blister closures in the wheel wells behind the seats. I’m assuming the 289 is no different than the 427 underneath. So you’ll then need to unbolt and crank those trailing arms out to move the Jag assembly further back in the wheel well. No telling what that will do to the alignment geometry which on the Jag suspension is a fair amount of work to change.