Yeah, its ok on the highway, pretty unimpressive stoplight to stoplight. My Mopar pals tell me it's a 67 block with 906 heads, it's for sure not a high performance engine. Holley 750 with cast iron intake and exhaust manifold.Looks like a keeper. Slow? I'm guessing lower performance 440? (later year build) with those 3.23s will make it sluggish stop light to stop light. I'm guessing decent highway performance?