66 cuda resto after 14 years of storage!

One question, or poll i should ask, do i keep the 273 or go for a lil more fun like a 318? I have to rebuild the 273 anyway so i figure why not get a lil more bang for my buck. Go for a bigger block and then have money well spent on a car i plan on holding onto, as i have done for so many years already?

Any ideas, comments welcome. Please sway my decision!!