Yeah, my research agrees with you except the 5.0 are smooth rails and the old are ribbed and won't work. The Felpro is around $50 so will probably go with the Felpro regular.
Thanks,
Mikey
Heck no. I installed one with my crate ford motor. Damn thing leaked so bad I thought I messed up the rear main. Spent all weekend changing it. PS cars suck to drop oil pan.