Purchased to replace a marine carburetor on a 350 Mercruiser. Edelbrock had a #1409 marine carburetor, but it cost almost $200 more than the #1405. After adding a longer throttle lever screw and plugging a vacuum line, it works great and is a huge improvement over the 25 year old original. In the end it saved the time it took to restore the old one and was cheaper than an exact replacement.