So I wish I could retract my original post. I was just trying to figure out a way to do a Foxbody in a different way that was more suited to my taste. I thought this forum was for helping fellow Foxbody owners talk about issue and problems in a constructive fashion and figure things out. Turn out it ends up being a place where if you are trying to do something folks have not done or don't agree on you just get bashed and insulted.
It really has nothing to do with taste.
Taste is a set of wheels, maybe turbo or supercharger, paint color etc.
The problem is that your plan isn't good.
It's been layed out for you a few ways, but it doesn't seem like you want to hear it.
The setup you are building doesn't really need a tune period, it's a NA 347 built from a stock block.
The stock computer will easy run it without modification.
I ran a similar setup with a more aggressive cam and a more street friendly intake and it was fine.
You don't have any nitrous, supercharger or turbo's. So retuning would do pretty much nothing.
You suggested you wanted to be able to change tunes depending on what you do with the car, but there really is nothing to change.
Tuning doesn't help with the wrong parts.
If anything make the car run right on the stock computer then tweak it with one of the systems these guys can help you with.
Me personally, i'm trying to save you time, money and headaches. If you aren't interested in any of those things, fair enough i'll leave you be.