Hi Mark, thanks for your response. My carb id the 1-11/16 size. the instruction sheet that came with it mentions Econoline vans, so I guess maybe it is a truck carb. I'm mostly just collecting parts right now for my build. I plan to put a 250 in my 1949 Ford. Just wanted something different, no "belly button" SBF or SBC. That's easy--everybody's got one! Besides that I've always wanted to build a hopped up six. I want the car to have kind of a custom or lead sled type look. I'd like to have multiple carbs on it to make it look more "period". Ok, now I'm just rambling! Anyway, thanks and BTW I checked out your website. Very nicely done! Cool site!