That’s not a Riv; it’s an Eldorado. (Same E body platform, but has the crappy 4.1 aluminum w/iron heads v8). Patrick
Wow, this is confusing...... You say Riveria, the seller says Rivera..... the right spelling is Riviera, but it's an Eldorado (not an ElDorado) And about that engine: it could also be the 350 Oldsmobile diesel.