There are only a few intakes available to for the R5P7 motors. One is the original casting of which I think there are 3 but could be as many as 5. These are for specific tracks and some teams got their power in different ways from others.
There is a company that makes a cast intake that will take either a single 4 or a doul 4. They are a little pricey at $1600 each.
Then there is the all out lets go fast model which is the Sheet metal version and best bet there is a 2x4.
Now for the injection, you will need a specific intake built so your choices are limited. Built means either modify a current intake or have one built.
I know the engine builder I talked to said I would make the most power with a sheet metal intake. Not sure if I want to drop the $4000 on one or just pony up the $1600.
Yes 40Ford is prob. the most knowledgable on the board about these followed by Jesse(R5P7Duster) I am still a guppy in this shark tank...