Nick, Please do not put a Chevy engine in that Mustang. I don't want you to be "one of those guys," here's why.
"Anyone can get power out of a Chevy engine; everything that can be done to a Chevy engine has already been done. All you have to do is decide how much power you want, then choose the already been done to death combination you need and do it. It takes 0 (ZERO) brain power and knowledge to build one." Understand that these are not "my" thoughts on the matter, I actually read that in a Hot Rod magazine years ago and it's been proven to be true many times over. Build a Ford, or heck even a Mopar engine for it, prove that you can get the power you want from one of them instead of taking the easy, way out. Save that Chevy engine for a future Chevy build or trade it for another engine of the proper kind. If you have the means, look into the new Hemi heads for the SBF (
http://www.nickariasjr.com/sb-ford-hemi.asp), they'll help you get awesome power out of a small block Ford and look fantastic while doing it in your engine bay. Dare to be different. Whatever you decide I'll still be one of those to support you, but I had to try and dissuade you. It's in my blood.
To answer your last question, I do not have any experience with the AHP AlphaTIG 200, but it has good reviews on Amazon. Maybe check for reviews on YouTube and see what they say as well. I am going to try a
Lotos LTPDC2000D Plasma Cutter, Tig, Stick Welder, 3 in 1 Combo Welding Machine, myself. It has good reviews on Amazon and YouTube and it is relatively inexpensive, er, actually downright cheap to boot.
That's bunk if you believe that. If it takes some sort of higher level of ingenuity to make a ford engine make more/or similar power than an LS equivalent, the " smart" thing to do then would be to take the easier path and convert.
There is nothing more commonplace than a 5.0 in a Fox Mustang...."daring to be different " is an open invitation to swap out that engine.
It doesn't take an advanced degree to learn that when you combine a 351 block, w/ a set of AFR185-205/TFS11r heads, a good cam and take your pick from a multitude of good intake offerings, your "science project" will net you in excess of 450 HP.
It also doesn't require much book larnin' to know that a 6.0 LS JY engine is a superior starting point, given that the foundation will be superior to a 351 on several levels. It doesn't make sense considering that a windsor engine platform is going on 60 years old., Seems ford could've done something in that time to deal with some of a 351's shortcomings. It also seems kinda stupid that Ford decided to dump all of their future R&D into the modular platform, an expensive to modify, technically challenging, and then jam all of that little stuff into a big giant box, that won't fit in nothing except a fox. On the other side of the street, the Chevy engineers chose to stay with similar technology that they knew would work in the new and aftermarket sectors,..and offer that engine in multiple sizes that start 50 cubic inches bigger than the mod engine, and not ignore their aftermarket sector like the guys at Ford have.
Staying true to the brand doesn't require any special skill, it only requires a brand loyalty.
And even after all of the above rant,..I am the poster child here for staying with the brand while daring to be different.
Does that make me smarter? Hardly. Most here would say it was stupid to spend the time and money on a project like mine fo the sake of keeping an LS out of my engine bay.
Doesn't mean that I have that much of a problem with it one way or the other,...but it definitely would've been the smarter thing to do, IF I was actually trying to accomplish something and had a plan to do it as cheaply as possible
(i.e. Get 400 c.i, 425/450, and 27 mpg)
Making a fast car may mean ditching that loyalty,..ford guys are the ones that all too easily forget what hotrodding was originally about,....