I recently purchased a 66 Dodge Dart GT with a rebuilt 273. It originally had a 2bbl carb but someone had replaced it with a Edelbrock 4bbl. What changes would i need to convert to the high performance 273 offered for that year?
Source yourself a service manual for the year of the car for starters. You will need to change the pistons and cam for starters if they haven't already been changed.