Oh yes, it will work but you will have to change the heatsink almost for sure. Chassis, bottom cover, ram, Lcd, Usb board, various circuitry... is all the same. Cpu is not, obviously. This is all off the top of my head, you may want to double check on a website that sells spare parts for example, but overall should be correct!
Would someone be kind enough to tell me the difference between Dell 17 L701 & L702 Cheers Mike 
702 & 701 differences