I have a passenger side manifold off an early 90s Dakota, which has the larger 2 1/8" outlet. I believe these will fit 318/340/360, and flow better than the original stock manifold. this was taken off of a 360 crate engine that was pushing 400hp. I'm asking $20 plus shipping from 75089. Shipping would be via Fedex Ground. Call 214-882-3727, or PM me. Thanks for looking.