Titan swap coilovers

Ok so I have a quick question about the extended coilovers needed for a titan swap. If people know parts and if u don't know don't comment the difference in a strut and shock is the spring is just around the shock and mounted around the shock making it a strut instead of it having shocks and then a separate spring like in the rear. My question is if I can find just the extended SHOCKS for the front for a titan swap the extended travel, will the stock spring be enough or would I have to go ahead and buy the extended shock with the spring around it. Again if I buy just the extended shocks for the front for a titan swap will the stock spring work or is it better to go ahead and buy it all put together. I do realize u have to have the spring compresses not an issue there just tryna save 600+ bucks when there is no need to. Any advice helps thanks