What engines will fit a 1990 ford ranger with a 2.9 automatic transmission?

For a 1990 Ford Ranger with a 2.9L V6 automatic transmission, compatible engine options include the 2.9L V6 itself, as well as the 3.0L Vulcan V6 from later models. Additionally, you could consider the 4.0L V6, which was commonly used in Rangers from 1990 onwards, although some modifications may be necessary for proper fitment. Always ensure that the transmission and engine are compatible and that any necessary adaptations are made for a successful swap.