My 1992 ford escort cabriolet which has done 75,000 miles and served me well has just blown a head gasket and I,m told by my mechanic that the cams need replacing also as they are wearing. The cost for this wil be around the £600 for both jobs. I also have a battery problem which is draning due to an electrical fault -although I can cope with this even if I had to replace the battery every year but not sure if the car is worth spending £600 seeing as I recently spent approx £500 having new starter motor and alternator. can I have some advice please