i am thinking you would wanna lower the cr for drivablity sake as for 11:1 cr you would need to run high octane fuel above the 91 octane easily avaliable here , would you not , also would the pcm be able to keep up with that high of a cr , i would also think to fuel it would you would need to upgrade injectors i would also want more tourqe then hp and want it low in the power band , four wheeling and towing . so if i am headed in the right direction i would assume all i would need is a short block , and possabily heads ?