I Live down in forida and I've always been told that i have to have a muffler. I may check the laws to see if it's 100% true or not. Because if I can straight pipe that 5.0l, it will sound real nice
"Because if I can straight pipe that 5.0l, it will sound real nice"
Uhhh, no it really won't. It will sound cool for the first day or so. After that, it will become a headache-inducing, teeth rattling nightmare. After your first trip down the highway, you'll want to get out and walk.
Mufflers help to control not just the volume, but also the tone/pitch of the exhaust sound. It's the muffler that gives that nice deep rumble everybody likes; and without any muffler at all, even a V8 will sound like a ricer with a fart can muffler. Lots of resonance, and a bad "tinny" vibration.
As for the legality, while it may or may not be a state equipment law where you live, you also have to consider noise ordinances in every town/local jurisdiction you travel through. Also, with no mufflers at all, plan on not being able to drive it at night, without really pissing off the neighbors.
As for "glasspacks", they have been proven to flow very poorly, compared to a "turbo" style or a Flowmaster type baffling system. "Glasspacks" and "Cherry Bombs" are only for getting a particular sound. They will hurt performance. The best choice is a complete cat-back system, like from Gibson or MAC,etc... However, if you're doing a custom system, and just looking for a muffler, then something like a Flowmaster, or something like a Dynomax Super-Turbo would work well. The key to minimizing muffler restriction, while still maintaining a reasonable sound reduction, is to size the muffler slightly larger than the incoming and outgoing pipes in/out of it. For example, if you have a 2.5" exhaust, then you might want a muffler labeled as a 3". Then just use adapters/reducers to connect it to your smaller exhaust pipes.