198 numbers matching or 340 clone...... opinions?

It depends on what you want. Like cruising around in a stocker? Sixes are cool for sure. Want to go fast? Fill the six with oil then back off all the rockers to close the valves. Build a 340 or 360.

This is the thing- Sixes are rare in the bigger cars - B,E bodies, etc. How many guys are looking for them, stock? Not many. If it was a one owner grandma garage kept beautiful 198, lots of folks would still swap in a 340.