I highly recomend it if anyone is interested in the gains. It was worth it. After working all the bugs out I saved up and bought the Paxton supercharger. It was great. Craig Conley at "Paradise Wheels" in CA did all the work. He is the owner, and exclusive retailer of the vintage Paxton Cobra kits. He custom bulids the charger according to your car. He takes into account your rear end gears, cam, type of lifters, compression, and even the type of water pump you have. All in all, it was an experience. I am thouroughly satisfied with the gains. Now, I'm thinking it would be great on a 347 stroker. There's always a next level.