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There are 8 plugs:

There are 2 plugs in the back of the engine were the transmission bolts to the engine. You will need to remove transmission or pull engine to fix those.

There are 2 plugs on each side of the engine just above were the oil pan bolts onto the engine. 1 on each side is hidden behind the motor mounts. There is 1 hidden behind the starter. The other one on the driverside you can see good.

There are 2 in the very front of the engine, 1 on each side of the timing cover and they are hard to see. Will have to remove a lot of stuff off the front of engine to get to those. And that makes 8. Caution If you do replace the 2 on the back of engine, the bigger plug in the CENTER of the block is a cam plug. Leave it alone, do not touch there is no coolant behind it. NEUTZ.

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Q: Where are the freeze plugs on a 1998 GM 305?
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