I also supplied custom pistons, rods, crankshaft and an otherwise apparently working engine, with a lot of custom parts.
Exactly who measures head studs? What do you compare them to? There's no measurements or dimensions on the ARP website, they don't just have sets of $400 head studs hanging around for no reason other than to just measure them up.. they thread in the block, they're labelled ARP, they came from an assembled engine and randomly thinking some muppet is going to install [something] into a RB instead of using the part made for an RB, for literally no reason isn't something you'd expect.
Like, who would think you'd put in 2JZ head studs (or whatever) into a RB?
And why wouldn't Subaru injectors work/check/be investigated?
I have an American crankshaft and rods, custom pistons, Japanese oil pump, different cams, etc etc etc etc, the injectors aren't Nissan, or Mitsubishi, or OEM, running aftermarket computer, etc. People put LS2 coils into RB, why not Subaru injectors?
I do suspect the wrong head studs is probably why the engine's gasket blew/head lifted in the first place which is why it went to Headspec to begin with, as I was very much over [removed's] work at the time. Given no one could really determine why it failed, other than the block looking like it had done 300,000km since the build and being ovalled, everything else 'seemed' OK.
Maybe found the culprit now