what do you need to know? i have one on my ford. it's not total water proof but close enough. you lose about 1' of bed space in the front. i have an extra cover, the part that rolls up. all you would need is the rails/track and the front assembly. also the under part of the cover is steel, strong enough for a 130lb girl to stand on (while washing the truck:rockwoot and strong enough to withstand a knife.
it came with the truck when i bought it. if you can find the tracks and stuff, ill cut you a great deal on the cover. but cost wise the previous owner said he paid 2200