What rear shock do I need?

[Spot1984]

I have a ece 6 inch drop on the rear. I have boxed the trailing arms, put on the hotchkis adjustable trailing arm brackets. I am running a 383 just north of 540 hp and will be adding a 150 shot of fun juice. I have the fuel tank mounted in rear of the frame. I will be running a th400, 12 bolt with welded tube, c clip eliminators, 4.10 gears. I need a good shock. thanks for the help. It will be a street/strip ride