Hard to say what it is. I know the 109 casting is RWD and the 110 is FWD. I guess if you didn't clean the dirt off it could look like a 9 or an 8. Goodwrench motors could have anything. I've never seen a 109 Goodwrench so you'll have to pull the pan and see. Another thing to look for and its the easy way to eyeball a 109 without looking is the drain plugs on both sides of the block. No other 3.8 block,except the stage motors have drain plugs. If the block is still in the car you can usually peek through the drivers wheel house and see them without getting dirty.