Well, you could do it the hardest way possible, like I did: Buy a used O-360 off eBay (with a backwards facing sump and front-mounted governor), throw a Superior cold-air horizontal intake sump on it, and finish it off with an Airflow Performance fuel injection system. You'll have to rework some of the baffles, get custom length fuel hoses and cables, make your own cable brackets, and if you use the Vetterman crossover exhaust, you'll have to get really clever with heat shields and cable routing. You might save a little money, but only if everything goes right and you get a stellar deal on the engine. Have an A&P look it over before you buy it, regardless.
I know the above sounds like whining, but it's not. This engine is going to rock the house when I'm done tinkering, and I have no regrets about doing it the way I did. Of course, knowing what I know now, I may have done it differently, but maybe not. But you should know what you're in for if you start ordering off-menu and a la carte.
The easiest way to do it is this: Buy a used O-360 that's as close as possible to the configuration that Van's sells, then get a Precision Silverhawk or a used or ovehauled Bendix FI system. With a stock Lycoming sump of either vertical or horizontal flavor, the bits in the appropriate FWF kit from Van's should just work with minimal hiccups.
I guess the short answer is 'yes, it's possible,' and 'but it depends.' This is experimental aviation, anything can be made to work, given enough resources, and assuming it doesn't violate principles of safety or the physical laws of the universe.