Can a 283 engine mount to 1980 Monte Carlo V6?
No, a 283 small-block Chevy engine will not directly mount to a 1980 Monte Carlo V6 engine mount locations. The 283 and the V6 in that Monte Carlo have different engine block dimensions and bolt patterns for the motor mounts. You'd need significant custom fabrication to make it work, including new motor mounts and potentially modifications to the frame.