I'm looking for a set of short velocity stacks. 1 3/4" tall would be about max heigth. Does anyone know where I could find some like this or get some made. They are for a 4150 Holley. What 5 1/8" opening? I have been all over the net and can't find anything.

Check Ebay, there's currently 1087 items listed under velocity stack, I'm sure you can find something there

I have been there. Most start out at about 4 3/4 to 5" tall. Till I'd cut it down it will not fit the top of the carb. Have to keep looking.

ask over in the hot rodders section. someone over there might know

Would the Max Wedge stacks work for you?...I'm sure places like Kramers Automotive make repros?...

If you want cheap it's time to get creative. Start looking for metal toy trumpets, cheap/used drum cymbals, big rig horn setups etc. Find something you can cut down and solder/braze a hold-down setup on it. If you want to use a screen don't forget they can be pretty restrictive so make sure it flutes out a bunch from the carb ID. If you take your time no one will see mickey-mouse rigged up junk, they will ask where do they get one like that!

Years ago I got some cheap spun aluminum ones. I was going to use them to make Dart hood scoops functional. They didn't have anything like a cross brace or anything to attatch. I was just going to glue them to the bottom of the hood. I think they called them air horns, or dual quad horns. For the life of me I can't remember where I got them, but I bet it was ebay. Maybe change your search terms and try again.