I've used every shock they sell at parts stores and have never been happy with any of them except the Koni Str.t and bilsteins. Nothing Monroe or Gabriel makes seems any better than the 15 dollar no name jobbers. If you just need to hang some part to keep it together then get the 15 dollar shocks.
The Str.t's are fine for your daily driver VW or whatever. If you want it to ride like it has some purpose in life then you need the Bilstein's or better. I know they are 100 bucks a stick, but it's better to spend 400 and be happy than to spend 200 and feel like you wasted 200.
1966 Mustang 302ci 4r70w, csrp front discs, 8.8 rear, EPAS, Fitech for fuel