I'm not qualified to know anything about the rebuilt rockauto injectors as I've never used them.........they are probably fine. Based on experience I am confident in old OEM injectors (after cleaning/testing) so I've never felt the need to spend money on anything else. Once I had a factory injector that would intermittently fire after long periods of inactivity, so I went to the salvage yard and got one to replace it. The injectors I'm currently running in my freshly rebuilt engine have over 250k miles on them and have only been cleaned & tested. Same thing for injector connectors. I know there are places that make these things new, but I am skeptical of the quality plastic they use. They are probably fine but I worry about how long they will hold up. To date I have only used connectors from the salvage yard. Whether Subaru, Toyota, or whatever I figure OEM quality is top notch. Of course I avoid taking used injector connectors from Toyota vans due to the extreme environment they have lived in. I take them with about 3 or more inches of wire then solder/shrink tube them into the van harness. On my rebuilt engine I built a removable injector harness so I could install/remove the engine without splitting the manifold........and yes, all the injector connectors are from Subarus in the salvage yard. Note: Since my van is an 89, it uses the Inverted Denso connectors (used in 88-89). All other years of van used the Bosch style. Here's a few pictures of my custom harness:







As for your broken stud question, there is a thread for that that's linked to the head gasket thread (linked to in my previous post). It's a bit time consuming but it works. I'm sure there are other ways, but that's the way I do it. BTW, unless you have a custom injector harness (like above), you need to remove the top half of the intake manifold to disconnect the engine wire harness from the injectors (this needs to be done before the head can be pulled). Once you've gotten that far removing the other manifolds isn't that big of deal. The worst part of pulling manifolds is dealing with the small fasteners and tubing on the back side of the manifold. If you cut an access hole for the "hose of death" then that makes it easier. FWIW, I've removed manifolds in the salvage yard before with only my basic "carry-in" tool kit. That job is always a little aggrevating, but I've never run into anything that was unsurmountable. Tim