Q: High priority - Chevy 454 overheating

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I have a chevy 454 that overheats, there is definetly a coolant leak but it doesnt leak till driving, and doesnt leak a lot. There is a white smoke upon startup and after driving about 10 minutes. it drove just fine last month. It's been driving about 15 blocks every week with no noticable issues till today. Engine oil was recently empty but now overfilled. Has a bit of hard starting too, needs me to pump the gas. Is also nearly silent at an idle. Any help would be greatly appreciated. Currently stranded

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