89 TBI 305 all stock. 167,000 miles. Has a strange knock. Not when cold more so after it reaches 160+ degrees. Knocks while idling and I can feel it in the gas pedal. After about 3k rpms it seems to go away. I don't drive it hard as its used as a daily driver. Recently replaced oil pump. All gaskets except heads. All new ps system. TBI has a fresh rebuild. Pass fuel line on TBI has a small twist on it closing the line up a little is imagine. Any guesses why it's knocking?