Very nice build :) Looks familiar :)
Can i offer a few observations you might want to consider.
The idlers change them single row bearings will give up very quickly with a lot of play. Use the idlers of the 3SGE timing belt, double row.
Personally i would of used an Autronic ECU . They are very good just that they dont have many fun bits like the MoTec but are really good for street tuning.
What size is the PWR barrel, maybe a bit small. What is the water pump you have used. Suggest high flowing pump Johnson m90
Recommend COP's for sure
With your gearing she probably will be around 16 psi max. If you get much more you have a restriction in what the engine can swallow. With a great flowing engine and the biggest Rotrex C38-91 max will be about 22 psi but it will have enormous power.
You dont have VVTi so ild be careful in increasing the C/R especially without proper knock monitoring and control either with a separate unit ( Autronic, MoTec ) or an aftermarket one.
BTW VVTi makes a world of difference
3 inch would be a bit too big unless its definitely over 250 RHKW. 2.5 might be better
BTW i hope the clutch / gear box / drive shafts and more importantly the engine as its not forged is it ? that it can handle it. I think it will be very risky pushing over 240 RWPH
Great to see another Rotrex !