You're looking to put this into your 93?
I think saying this is going to make me sick, but reconsider the LS swap.
Going into the earlier truck is going to throw out a lot of what makes the Explorer 5.0L desired for the later trucks. The engine mounts aren't going to work the same, you will need adapter plates or swap mounts. The EFI system isn;t a near direct swap in like on the later model trucks. Fuel system differences. ETC...
As noted previously you're actually better off with the earlier GT40 heads because of the exhaust options. The torque monsters are about the only thing made for and working with the GT40P heads (in a Ranger) due to the plug angle and the best fit for a 98+4x4 engine bay, but they are not cheap, the maker is difficult to work with, and there is quite the wait time. The GT40 heads have the standard plug angle and a lot more and better flowing exhaust options, even when sticking with OEM manifolds. The slight power gain is not worth the hassles of the "P" heads, and can likely be surpassed with good exhaust on the non "P" heads. As mentioned by lil_Blue_Ford above, the manifolds you pictured are not stock manifolds, those are uber rare FMS Explorer headers. The OEM manifolds, both styles, are much more restrictive.
If I were doing the swap on the earlier truck I'd use the 96-97 Explorer mostly for the short block, the intake, and the transmission if it had the right one. I might use the heads or I might order a set of aftermarket aluminum heads. I wouldn't spend any money on the GT40s aside from maybe valve stem seals, I'd lap the valves if needed, and install a camshaft and supporting valve springs. Given a do-over I'd say the same for the GT-40Ps. BT, DT, got the t-shirt (literally). I was way too focused on keeping factory heads. Instead of the Explorer EFI system, I'd install a Holley EFI system that has transmission controls if using the 4R70W. If I kept the GT heads for now, I'd be setting aside for aftermarket heads at a later date. I'd also pick up a second intake manifold and send it off for porting job to install with the new heads, or figure out what a good aftermarket intake is.
By the time you consider all of that, you're into the same money as an LS swap that makes more power. I hate it, really don't want to suggest a LS in a Ford, but it was mentioned and I'm being realistic.
Welcome Visitor! Please take a few seconds and 
, and not racing, just offroading moving rig that weighs near 6k if I remember right with all the stuff in it... my stupid '00 Explorer gets around good and when being nice to it gets like 18mpg on the highway, going slow in the woods is another story... but it's a 5k pound mommy missile... for now, I really am itching on modding it into a wheeling machine... not gonna muddy up this thread with my wacky plans...
