383 is a GREAT street motor. With the extra stroke it promotes low end torque.Its what i got in my 78 truck(check the intro page for a pic) I have built 4 of em. The one I currently have dynoed at 432 rwhp and 486 fptq. I still get 14 miles a gallon with a 700r4 tranny and a 3.08 rear gear and it is dead reliable, as in I have driven it to west palm beach,fla and back several times