Some body please help.I've got a # matching 70 1/2 z/28 solid lifter eng. It has started running real rich so rich that it fouls out my plugs and the smell will run you off. I've replaced the carb with a new holley 750 that didn't help same thing.
i got another new 750 that
i haven't put on yet I replaced the fuel filter because i've got some thash in my tank could my mechanical fuel pump be at fault. this is really got me stumped
I've seen fuel pumps go bad and leak into the engine diluting the oil. Usually the oil level goes up. the diluted oil goes past the rings easily, and fouls the plugs.
Check your vapor recovery lines, maybe something is wrong there.