Seems about right and it should feel pretty snappy at that horsepower. We had a 318 that had the same horsepower to the rear wheels with 3.91 gears in a 71 Scamp. It ran 14.90s and 95-96mph in the quarter mile.
It is very snappy actually. I have a stage 2 shift kit in the trans. and it kicks in pretty good when shifting and kickdown is nice. I do get a little chirp in the tires when 2nd gear hits.