Bryan, you have your heart in the right place, but please please please do some extensive reading on raw feeding before you start giving it a try. A balanced raw food diet is the best thing you can give your cats, but an unbalanced, home-made raw food diet is one of the worst things you can do for your cats' health. It's complicated trying to navigate all this information on your own, but it must be done right, so be very careful.
You can't just pick up random pieces of meat and organs from the grocery store, bring it to your cats, and feed it to them at random. That can cause some serious nutritional deficiencies. Cats need to get the right proportion (which isn't exact, but a close approximation) of muscle meat vs. organs vs. bone, they need taurine, calcium, etc. I've done so much reading about this, yet I still do not feel like I know enough to attempt this on my own, so I use a high quality commercial raw food intended for cats (which is ground, but is supplemented with taurine and has the right proportions) and supplement it with some organs and meaty bones 3x a week so that my cat gets to chew. This is something you may want to consider.
Here are some resources:
Feeding Your Cat: Know the Basics of Feline Nutrition :: healthy cat diet, making cat food, litter box, cat food, cat nutrition, cat urinary tract health
Feline Nutrition & Raw Diets for IBD Cats
Feeding Cats Raw
Raw Feeding Instructions
Keep in mind, some sources have contradictory information on certain fine points or raw feeding... and on certain not-so-fine points. But read as much as you can and try to make the best determination, to the best of your knowledge.
Okay, so now that we have THAT covered... you also need to learn how to transition your cats to a raw food diet. Many of these links already cover that, but in concept it's fairly simple, so I will mention here as well.
You can't expect to bring home some raw food and have your cats just eat it up when they've been eating something else their whole lives. Cats are creatures of habit and can be picky eaters. You must transition them slowly into any new diet, not just because of that, but also because their digestive systems need to get used to the new diet.
If they aren't already, transition your cats into fully canned first. No kibble... no free-feeding. Just 2 or 3 scheduled meals of canned food only. Once they are used to that, start mixing in tiny amounts of raw food into their canned food. Slowly increase the amount of raw food (and decrease the amount of canned) as they get used to the new tastes and smells. Eventually, you will be able to feed them mostly raw food, with very little canned. And once they are used to that, you can get them on full raw.
This transition can take a few weeks... or a few months. It depends on the cat, and older cats in particular are very hard to convince to change habits and diets. Patience is key. Even if it takes a whole year, be patient... keep trying. Even if you're just giving them a little bit of raw with canned food, that's still a huge benefit for them. See every little improvement as a milestone, and keep trying to trick them into eating more raw food. But whatever you do, don't go 24 hours without feeding them. You can make them a little hungry by delaying a meal a few hours, or giving a smaller meal in the morning so they'll be hungrier and more likely to eat whatever you give them in the afternoon (for example), but don't let them skip full meals for long periods of time. Sometimes that means giving in and letting them just have the canned food for a meal. But keep trying...