Hi there I was wondering if anyone could give a rough idea of the power output of the engine I have ... (it isn't really easy to get it dyno-ed here in Spain). It is a 289 block bored 30 over with Keith Black flat-top pistons, the heads are 351W from 1970 with stock valve sizes and I worked the compression out to be 9.6:1. The cam is a comp cams 280h with .512 gross valve lift for int & exhaust and 230 duration at .050 at both intake and exhaust .. lobe separation 110. New comp cams lifters, valve springs and roller tip rockers with 1.6 ratio. The carb is a holley 650 with vac secondaries on a weiand stealth intake manifold. The headers are Try-Y or similar with 3 inch collectors leading to a 2.5 inch dual exhaust system with a H-pipe. Most other stuff is stock and the car has a 4 speed top loader with Hurst comp plus shifter. Nearly forgot .... GT350 side stripes ... must be worth at least 25hp. Sorry to have to post this, but I have no idea how to *guesstimate* HP.