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I had a gmc truck once that had a terrible exhaust leak I was told it was because it had 305 heads on a 350 block and the mechanic that told me this plugged up the leak with a bolt it sounded like it was out of oil all the time go figure! acctually if you put 305 heads on a 350 it will increase compression and you will have more low end torque so go for it dude

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17y ago

What else can I help you with?