Dyno'd my Duster 340 how did I do?

Interesting. I learn something every day. I've never used a Mustang dyno before. I will say the power levels indicate in both cases that improvmetns can be made. You cannot anticipate power levels well unless every facet of the work is know. I know a lot of "400hp" engines that dont make over 320 because the sum of the parts is not the total of the magazine writeups. Race one of the cars on a track and post it. I'd be very interested in the results.