Have a look in the forced performance thread at the rb25 dyno results , a guy named talky has the same setup , made 245rwk with a l2 on standard injectors . Personally i'd go a t67 20g if you definitely want 300rwk , but remember it's just a number at the end of the day , a good responsive 250~280+rwk in a light r32 will make you more than happy . Not saying the td06 won't make 300 , but it would be right on it's limit , e85 would get you there