Supercharging is the way I would have went if I could have afforded it. I don't know that I would go with a 2800 stall converter for a daily driver, if yours is to be a daily driver. It will kill gas mileage, if that is a concern at all, and it will feel a little loose. I would go with a 2000 or 2200 stall if you are driving it alot. If it is a weekend only car, by all means do the 2800. I also think the D36 will handle 400rwhp for quite a while, maybe forever, if you don't drag race on ET streets or slicks. I don't know that I'd replace it just yet. Trans is pretty durable as well, try to avoid full throttle 3-4 shifts or manually downshifting. I've hammered my car pretty hard with Nitto drag radials, a 2800 stall, a 150 shot of nitrous and some other stuff and the D36 and the 100K mile trans is still going strong. I don't launch with the nitrous, that might help. I wait till it is hooked up before I hit the switch. Again, tho, read my first sentence in this post.