273, could it be a commando and CAM question?

the fact you can smoke the tires from a rolling start tells me you probable have the commando motor - the one I had sure wouldn't do that but I didn't have a 3000 stall either. How in the world did you get that hooked up to a 727 - did you drill out the pilot hole on the crank? Mine had a 904 with the small spline shaft and was a 67 273. Also, I went with a 904 on the 360 because they are supposed to use 20hp less than a 727.