Andy, so you are going to raise comp, I guess it's an NA build then?
I'm told the Extreme twin plate clutch with carbon plates is very streetable, but I still think sprung plates are good for the drive line.
Amayama trading (Japan, gen Toy parts to your door) is sounding good, might email them myself for a full gasket set.
Your pic of the LH head shows a bolt on with a pulley, that's where the cooling fan Hyd pump goes, so is that an idler instead of a pump,
I'd like one of those?
I'll look up ToyoDIY.com to see what year that is from, do you know what year your engine is?