MSD 5520 Street Fire Ignition Control Box , Black

I put this MSD ignition box on my 1993 f-150 short wheel base cingle cab truck with a 1988 5.0 H.O. Mustang GT motor , gasket matched port and polished stock e7 heads and the truck intake, ‘wich is almost twice the size of the gt’ , 2 1/2 inch duel exhaust with flowmasters, no H pipe yet ,stock gt shorty headers and the part of the the smog pump that flows fresh air into the heads hooked up , have the MSD Super Conductor wires , rotor cap and the MSD Blaster coil . Right now im running Bosch Super Copper plugs and have opened the gap to .o65in adjusted the timing a little and im getting a consistant 3 to 4 miles a gallon ,’on the hiway’ better than before without the ignition box and it smoothed out the rough cold starts in the mornings too. This is a great product for my weak stock ford ignition really tied it all together . It really made the gas peddle stiffen up and much more responsive and now i have to relearn how much peddle to give it when the light turns green , i try to baby the tires , but now i keep wanting to goose it a little to feel that power i was missing . People who cant tell a difference need to make sure they have the right plug wires and a properly functioning coil , good spark plugs and the correct setting on your timing, if not the the spark cant get to the plugs ,it grounds out somewhere along the line , you can see this by turning out all the lights around you and waiting for your eyes to adjust and if your plug wires are old or the wrong ones then you will see a fire works show. This is my first after market ignition box, never needed one before the newer cars and trucks have much better stock ignitions now than in 1993. Hope this was helpfull.