Magnum Cam, and rough idle
I recently installed a Magnum 280H cam in my 77 400. We built the top end of the car with Rhoades lifters, new push rods, and 1.65 roller rockers. We finally got the car running, and I drove it home today with the new cam over about 90 miles. I could feel the difference the cam made after the highway drive. The car pulls nice, but it spits out black smoke sometimes when I push it hard from a stop. The car also has a really hard time in reverse. It will die after 2-3 seconds in reverse without any gas applied. It also dies in idle about one in every ten traffic lights. Is the timing off, or do I need to tune the carb?
Also, the cam seems to cause huge amounts of engine movement. Idle vibration is really bad after the car has been driving around for 10-15 minutes. Feels like I am off roading in a jeep, but the car is sitting. My exhaust tips are vibrating about 3-4 inches around, and the engine is moving 5-6 inches left and right. Can I get stronger motor mounts to prevent this?
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