[OverBoardProject]

If you plan on keeping your Blazer for several years you'll probably want to keep the origional equiptment wires. They'll last longer than the rest put together

Otherwise Bosch would be my second choice.

{edit} if you live by a race track you might be able to buy a used set from some racer. They often replace things like very good quality plug wires yearly just to ensure that they won't have any problems.