What is the plan for the car? This will help in determining what is needed. Is it for drag racing, highway pulls, fun weekend car, mountain runner, etc. What power numbers do you want and is it usable power. I would take a 275whp d series on the street over a 400whp d series.

Here are my suggestions, in my opinion.

I would go with 9.5:1 or higher compression. With only a 1.5L and if you run a big turbo you need all the help you can to spool the turbo and have usable power. Whats the point of 400whp if it is only for 1k rpm. You can do this compression or higher just fine on pump gas.

Pick a turbo for your plans. If you want 300whp then pick a turbo that can make 350whp. Don't have a 600whp turbo on a motor that can only make 400whp. Also, 60 trim is just the cut of the wheel. You can have a t28 60 trim or a BW s372 with a 60 trim. Two totally different turbos.

Airflow is critical in making big power with small motors. This is for both intake (intercooler piping, etc) and exhaust. Make sure everything is well made and smooth flowing. A good 2.5in downpipe will be enough is made right (made 565whp on 2.5in downpipe on pump gas).

Don't shim oil pump. Honda pumps make enough pressure. Even with a very small shim you will see well over 100psi at redline. Just causes more leaks. Unless you plan on running very very loose bearing clearances just run a stock pump.

Good luck with build and keep us updated.