Any intake will bolt up as head bolt pattern is unchanged and I believe you'll need the elbow still...
You said you wanted to boost that mill, well you need a plan in order to get it done properly.
First the GT40 heads are useless as they don't flow at all, even in N/A application I wouldn't use them so the point is moot with force induction.
185cc AFR, Trick Flow or Edelbrock Junior are a good aftermarket alternative for those 302/351 engines. A complete set of those heads (aluminum) with valves retails for about $1200/1300 last time I checked.
As for the BBK intake, I'm not sure how worthy it is with boost...
Go to the Classic Section, ask them that you want to build a boosted 94 5.0 and see what they suggest.
Don't mention that it will go into a Bimmer so those guys don't get sidetracked. lol.