I have a 87 ranger with a rebuilt 302, the man i bought it from said it had about 15k miles on it since the rebuild. My question is that it makes a ticking noise when at idle and during acceleration, it is quieter at idle and louder at acceleration. Could it be an exhaust leak, i had the hood up a few days ago while the engine was warm and could see a puff of exhaust coming out of the pipe right after the header. The headers also look to be homemade, it does not seem to affect performance but doesn't sound right. If anyone has any ideas what it might be can you let me know.