I'm new here too and on my first 200r4 build and by no means an expert. I looked up your codes in Ck's book. He list the CT as one of the better of the low performance vb's and says 4000-4900 WOT shifts are possible.
For simplicity reasons you should search for a BR, CZ, or KZ vb. You can find them with the correct governor for $300-350. That is unless you are prepared to be dropping the pan a few times to play with the governor tuning.