So I just bought another 71 duster. Motor runs like crazy.I'm wondering what kind of HP u guys think its got. Here the info from the build. 73 340 block. KB pistons borr4.040 stroke is 3.310 valves 2.02 and 1.60 ported and polished. Edelbrock 600cfm carb cam is a summit centerline 292 duration 508 lift. Thanks for any help.