From what I've dug around on.. the Vette intake is 3.5 dia.. the Nitro 3.7L appears to be 3"
That's why it should work on the SRT. The ID of the TB is 74mm so the OD with the rubber gasket would be close to 3.5". If you went with 3" ID on the Y pipe the OD would be around 3.125" How would you attach that to the TB?