I recently picked up a 1956 GMC 270 to replace the rusted hulk of a 216 in my '50 Styleline. My goal is a smooth and torquey engine with a little extra zip from stock.The engine seems in decent condition but it is a core. In the interest of rebuilding this, I've been wanting to do some of the preliminary engine math. I'm trying to plan static and dynamic compression ratios in order to pick an appropriate cam, pistons, carburetion etc. I've been able to find stroke, rod and bore info easily, but am having a hell of a time finding out conclusively what the actual deck height is as well as the deck clearance. The best info I could find was that the deck height is 11.0625", but this info was posted as a question and was not verified with any authority. I'm assuming the piston compression height is 11.0625" - 2" (half the stroke) - 7" rod length - whatever the deck clearance may be. Last, it's been very difficult coming up with actual cam grind specs as well. Any cam advice from personal experience is definitely welcome. Any info and insight would be a great help and is sincerely appreciated.