Engine/Gearbox Weakness

[Will-I-Am]

Hi Guys.

Bought a LSD for my track yaris and the list is getting shorter for mods on the yaris. So i've been running the TTE compressor kit for a while and all just runs fine. But what if i want to get more boost from it? What are the main things to worry about. Looking to get about 200/225 whp which should be more than enough, more is just silly on a fwd car especially on the track. Any of you guys have had some experience with the following things?

ECU (Link/AEM?)
Connecting rods (Molnar?)
Headbolts (ARP?)
Low comp pistons 9.0:1 or 8.0:1 (CP?)
Smaller fixed compressor pulley (about 20/30% smaller?)
Larger injectors/Rail/Fuelpump/Swirlpot etc

What about the head, i presume the valves and springs could use an upgrade and what about the gearbox? How many HP/torque can a stock gearbox take before blowing up? also what about the rev limit on a stock gearbox?

Thanks!