Help! My 1993 has developed an oil leak that defies detection (according to the mechanic at the local Chevy dealership. I have had the oil pan gasket replaced as well as the oil drain bolt and washer. It is not leaking around the valve cover gaskets, but appears to be leaking somewhere in the front of the engine. It is not leaking alot, but just enought to be an annoyance. I know that not too long ago the gasket for the distributor was relplaced during a routine tuneup;I suppose this could be the problem once again. Any help from the very knowledgeable individuals on this board would be greatly appreciated. Additionally, has anyone had any dealings with the John Lingerfeldt (sp.) company? I met a Vette owner who had some work done by them, and was very enthusiastic over the results. Please e-mail me if anyone as dealt with them; I have some questions I need answered and don't wish to take up space on this board. Thanks.