That is correct, you would use the 3.4-liter R150F bell-housing to mate the R151F to your 3.4-liter motor. Or, you could always buy our adapter plate kit and run the gear drive case behind the R150F transmission, depending on what you are trying to do. I hope this helps!
![Driving :driving:](https://board.marlincrawler.com/Smileys/marlin/driving.gif)