you will be ok with a stock shock. if funds allow revalving and a stiffer spring is good but no necassary. Im running a stock shock with a plus 6 arm. Ive got a great deal on a complete chrome, raw or pc'd swingarm. compete with billet carrier, front pivot bearing, brake line, brake mount, adjustment tool and line clamp. Also carry new silver chain for extended a arms. Shoot me a pm or give me a call for more info.