I would go K if you have the money. If its out of your price range then a h2b would be next in line, ( the h2b kit is around $930 depending on which year car you are putting it into but you need a little more then just a the plate to get it in the car) if that is out of your price range then a straight h with some good mounts and axles ( not ebay). The weight differnece is barely noticeable IMO between a H and a B. If you end up going h2b then the wieght differnece is like 20 lbs or so over the regualr B swap.. I hope this info helps you out and good luck on your project.