well i got the corvette out today and warmed it up then while i was drivin it to a town nearby about 8 miles i got on it a little and it hicupped then ran fine but when i got to town and slowed down i noticed a tapping sound like a header gaset leak or a loose lifter tap? and noticed some smoke from the drivers tail pipe bluish black?? any idea what i may have damaged? this car did sit for sometime before the guy i got it from bought it but seemed to run fine until this?? Any help would be appreciated!!! thanx Tony