what size do you want is it for a 351 or 302. a double pumper holley is the way to go if you want it to run,be careful when buying one used its better if you can see it run or pay the person selling it to install it to make sure its not a turd. it took me 3 -100.00 carbs to make 1 good one. and I know how to work on holley double pumpers. so 300.00 and a rebuild kit later I have a great 700 dp and a big box of parts.