For the best dollar, you need to v-8. You can get 200hrp from the 6, but you are going to pay for it. It cost me around $3000 to do my last block L-28 with E-31 Head. Horsepower cost is better with the V-8, more for less. How big of a checkbook do you have to give? Check under the search engine and look at the info on the change, it isn't that hard to do. A simple engine change without a lot of mods will still give you more power per dollar. Good Luck.