A lot of people don't like to hear that, but it's true. They were not the best low end street motors. But open up the carburation, open up the headers, put a 5:13 rear behind it and wing it to 7000rpm (or more) and and get out of the way.
I actually got a ride in a '70 or '71(actually don't remember, was a kid and just hopped in the passenger door) in the mid 70's. It was the guys sister's car. He lit it up for all it was worth and then said "this thing don't impress me...my small block Chevy would kick it's ass!" LOL. don't know how true that was but he wasn't all that impressed with it.