302 casting potential?
When it comes to the W2 exhaust port reference- I believe due to 20 something years of the same 340/360 low floor exh port, people tend to call any mopar exhaust with a good raised floor 'w2 style'.jmo
But really...They wouldn't come anywhere close to what a w2 exhaust flows.
when you get 1/2 inch tall then layed back type floor from the seat, then you have something 'like' a w2 exh port.jmo