[Darrell Ratchner]

Jimbo, the 1849 is listed as a 550 CFM Vacuum Secondary Carb. It should not have a metering block, but should have a metering plate inside the float bowl. This should fit on the 2x4 intake. The 550 cfm, in a vacuum secondary should work out good. I have not used them but the venturies are small.
Any other questions specifically? Primary main jet is a 62, Secondary metering plate is a 134-5. I'm at 6000 feet elevation so I always have to lean the carbs. I cannot give you much help there. Good luck Darrell