Looking to buy/build 500-600 fwhp 360

Trans is a fresh rebuild, and it is the "Hemi" 4 speed. My dad had it build for drag racing. He has the synchronizers modified, something about every other tooth removed. I think the 3rd member on the 8 3/4 is a posi that has been rebuilt. I figured the trans would hold up if they were behind Hemi's. I guess if it breaks I will have to upgrade to a Lenco and Dana 60. Just kidding, don't really want to do that...
Now Lurch, I don't know how to ask this without comin off as a smartass....and I promise, I'm not....BUT......and bear with me......

Do you know WHAT 500-600 HP even feels like, or are these numbers you're just reaching outta the sky for? A lot of people have never driven or been in a car with that much power. All too often we get newbies or kids (not saying you're either....I don't really know) and they just spit out numbers they've read about in magazines or on forums. 500-600 HP will get you deep into the tens and possibly faster in a light A body.

I am asking simply because If you don't want something "that fast or quick" it's gonna save you a lot of cash. Help us out here.