Using the ACCEl 5000 series of wires is a good choice for a mild build. You don't want to use too low of a resistance such as the MSD for an everyday driver. Typically something that low of a resistance will work great for a race car and a street driven car, but you have a truck that goes off-road and must return home! Also consider that the stock GM plug wires that came on the Blazer when new were probaly in the 1000-2000 ohms per foot of resistance. So a good upgrade would be the ACCEL's at 500 ohms per foot. They will be much better than stock, with better materials for longer durability and lower resistance for more fire to the plugs. Going to a race wire with 40-150 ohms per foot of resistance will bring more power but is unneccassary for what you are doing with this build. ACCEL Universal fit wires, cut to your own length is part #5041 (Good), #8031 (Better) or 9001 (Best).
Does this make sense?