Id take the head off mate and see if any are bent if you just put another belt on and a few are bent it might make things worse when it turn's over it's only about 30 for a gen ford headgasket and about another 20-30 for a belt you could half that if you buy non genuine ford parts but it's up to you like SafeChav said you MIGHT!! be lucky but all the one's ive had go have bent atleast 2 valve's i had an XR3i going along not fast and it cut out and i did the same tryed turning it over a few time's then checked the belt and it was snapped when i took the head off i had bent every valve