rear suspension? 4 link? caltrac mono leaf? street lynx?

1000 hp? You need all the adjustability you can get. IMHO i would go 4 link and custom valved double adjustables for your final combination. BUT- First i would wear out the phone calling every good chassis builder i could think of to get seasoned, professional advise on this deal. Same with the shocks. I am on my fourth upgrade for rear shocks going from 10s to mid 8s. Get a lot of professional input to make sure you end up with the best combo your$$ will buy.
Once you head down a certain road on this, a lot of $$$ will be committed and it will be tough to correct a less than optimum choice in parts or chassis design.