I was talking to a chap at Trax who has a 100k+ RX7 build for TA 2015.
Anyway his friend has a 550bhp VX220 built to a similar budget byt he sounds of it, also competing in TA next year. I gather he is also handy behind the wheel.
So this can be considered something of a rumour, but we may have to readjust our superlative VX220 ideas.