put on the one you are familiar with....thereby you have least problems.... I have a Holley 650.....as when I got my car , my carb was bad..I asked my professional restorer friend "which is the best carb to buy".? this was his reply: "use the carb. you or someone you know likes to work on" so i asked "which one do YOU prefer to work on"? he said : Holleys " (he used to race) I said: "thats rthe one were buying"!
