14's for the small bolt pattern? '65 Valiant

I have a '65 Valiant 200, still with its original 13's and Valiant wheel covers. Its a Slant 6-mobile daily driver and I'd like to go to 14 inch rims for better handling and fuel economy, as well as ease of finding tires. I'm pretty sure the pre 67's use a small bolt pattern. 5x4? I'd like to be able to just throw some big ol' early '70s Chrysler product wheels on it, as I have heard finding small bolt pattern 14's can be difficult. So what all is involved in going up to the larger bolt pattern? Am I just changing brake hardware? Any help would be appreciated. Thanks.