What is the right engine for your 1969 roadrunner vin RM23H9A293344?

The VIN RM23H9A293344 indicates a 1969 Plymouth Road Runner. However, the VIN alone doesn't specify the engine. The engine code would be found on a plate on the engine itself, or potentially on the vehicle's original build sheet (if you can locate one). The VIN only tells you the year, make, model, and assembly plant (Hamtramck, Michigan in this case).

To determine the original engine, you'll need to find either:

* The engine itself: Look for a code stamped on the engine block. This code will correspond to a specific engine type.

* The original build sheet: This document will list all the options and components, including the engine, installed at the factory. These are difficult to locate but are highly valuable for accuracy.

* A copy of the original sales invoice: This might list the engine.

Without additional information, it's impossible to say definitively what engine was originally in that particular 1969 Road Runner. Many engine options were available.