Re: loud engine noise
The tapping noise may be the throwout arm vibrating on the bellhousing. Mine did this after we put the manual in and I was convinced it was a lifter. Turned out we handn't put the return spring on the clutch pedel which keeps bit of tension in the cable. When did the cruise stop working? Does it turn on but not set? It may have a vac leak in the vac system. Your pedel switches may need to be adjusted toward the pedel a bit more.
Dot Aye You