I HAVE REPLACED THE ENGINE IN MY 95 SILVERADO WITH A VORTEC 350 OUT OF A 98 SILVERADO. I PURCHASED AN AFTERMARKET ALUMINUM INTAKE SO I CAN STILL USE MY THROTTLE BODY. THE TRUCK RAN FINE FOR ABOUT A WEEK NOW IT SPITS AND SPUTTERS FROM TIME TO TIME BUT NOT ALWAYS. I HAVE REPLACED DISTRIBUTOR AND EVERY SENSOR ON IT. MY QUESTION IS IF THE CAMSHAFT COULD BE A PROBLEM OR WHAT. I AM LOST AND NEED HELP