That sounds reasonable. Atlantic british had the "kit" less the bottom radiator which at the time was on back order. I went with British Pacific, although they did not offer a "kit" they had all the hoses at a reasonable cost and in-stock. I also order all the temp senders and relays just to complete the job on my 97 D1. While your at it replace the thermostat and all the hose clamps. I found the stock Rover hose clamps to be cheesy.
fergy