Opinions

There are lots of advantages to using the 273. Do you know what year the 273 and or transmission is? I have NOS pistons and rings I'd sell at a reasonable price. A 360 has more potential but also comes with more change, especially if one exercises that potential. Like the whole drivetrain and exhaust. A HiPo 273 will push that 64 convertible plenty fast and get good mpg.