Want to build costom turbo kit. Need advice from boosted guys!

[Blown_xa]

From assembling a few different Toyota motors, I can tell you that the Scion tC motor has the same dimension valve springs. So I've thought about just purchasing upgraded springs ( advertised for the tC) and using those.

I guess I have lucked out, using stock head and my limiter is set to 7300rpm. I've even slammed it in the wrong gear a few times and the rpm shot well past what the tach shows (8000 rpm). I'm pretty sure it was about 9000 rpm once when I was at the dragstrip and put it in second instead of 4th. I think the only reason I didnt get valve contact was because maybe the valves cleared the lower compression pistons even with float. I did hear a noise afterwards which scared me for a few minutes, until I figured out that my power steering belt flipped upside down! Lol