Looking at it from the other end, not many people get much below mid-11s with the TE44 so I would think the 42.5# injectors will match up fine with the turbo. They are capable, at 510 hp, of going further than the turbo is if you ignore advertising and look at what people generally run with a given turbo.
If you are going to the aluminum heads, you should consider a jump in the turbo down the road and matching injectors to go with it.
I will be using the alky and i'm considering the gn-1 heads. Just want to be able to run in the 11's without pushing to hard and not having to run race gas. Would the iron heads by champion get me there also?