You are asking;
A. Hey, should I replace the head gasket on my low mileage Porsche engine and enjoy driving it for a long?
B. Hey, Should I put liquid glass in the coolant of my low mileage Porsche engine and take a chance seizing it up when enough coolant enters the cylinders and crankase?
I haven't priced an '88 Porsche short block in a long time (ever), but only one of these two options should even be considered.
A. Hey, should I replace the head gasket on my low mileage Porsche engine and enjoy driving it for a long?
B. Hey, Should I put liquid glass in the coolant of my low mileage Porsche engine and take a chance seizing it up when enough coolant enters the cylinders and crankase?
I haven't priced an '88 Porsche short block in a long time (ever), but only one of these two options should even be considered.