keep the six...everybody and their toothless brother has a v-8. i think that the six is the best part about these old trucks. my 61 has a 235 in it and i hated it when i got it but the more i work and tinker with it the more i like it, it has a lot of character. not to mention the fact that not a lot of people are driving inline sixes around these days, and the pollutant police cant ride my a$$ for driving a gas hog planet destroyer. i like the straight six, just my $.02