We offer the gas struts for the front bonnet as well as the rear clamshell. We have these custom made. For both sets we have pressure (lifting power) the same spec as OEM. Obviously, the clamshell struts are a LOT more powerful than the fronts. They will most definitely feel stronger to you because aging struts have a slow death - making it hard for you to detect until they just don't work.
The fronts go right on. OEM uses a 6mm ball and an 8mm ball - arguably to prevent the assembly guys from installing them upside down. Ford has the same ball arrangement for the rear... but the rears are a lot more powerful and they use a larger/stronger diameter rod. Nowhere in the aftermarket have I found a smallish 6mm ball end for this size rod diameter. So, we convert the rear to a 10mm. More importantly, we insisted that the rear clamshell have the same or fractionally greater opening than OEM - hence we have a small offset in the ball placement to achieve this. The aforementioned struts from O'rielly's LOOK very similar to OEM - maybe only a 1/4" or so shorter. But this shorter strut decreases clamshell opening by ~3". It is very noticeable.
Ask anyone, if you want to fix the erection problem, you don't want to sacrifice length to get there! LOL