97 Tahoe Stereo Setup Opinions

There is honestly no accurate whay of guessing what your going to hit.  depends on how you wired it. Also depends on what the amp is getting from power and if its stable power. Also depends on how its wired if your wired them in parallel it could make a difference and the size power wire and spoeaker wire you use makes a difference. So its really hardto accuaratly tell you what you might hit even guessing is a long shot

Sounds like a decent setup for a box thats something I never got into. Too muhc of a pain I mean i foberglass everything but all my enclosures are sealed. I have a 94 ford explorer so im in the same boat as you really. Both suvs so In my opinion sealed enclosures are fine if you have a car i go ported into the rear deck but thats me. Everyone is different. Hope you get the help on the box tho im not too much of a help on that sorry