I love your project . Please keep us posted . I may be so bold to suggest a Jeep 4.0l./258/270. They are available in yards for cheap , parts are available everywhere and decent power and mileage can be had . You can choose carb or efi , automatic with o.d. or manusl with o.d. AND, it looks cool . AND it slides in with no fitment issues . Win, win, win