I just don't know enough about spark plugs. Whats up with the different heat ranges? Hotter plugs? Advantages of Platinum and double Platinum? Where they should and shouldn't be used? Anyone know a good article or some resource to learn this stuff? Dealership enviroment doesn't give me much chance ot learn this stuff. Its just, put in what was factory and thats that. Which works very well, but for performance stuff I just don't know. Like what plugs should be in my Sister's 5.0 mustang? Her ex puts AutoLite plugs in EVERYTHING and I just don't have a good feeling about them overall. Or what belongs in my Propane powered 383 project? How about Dad's Alcohol fueled 350?? I'm "sparked" onto this topic by my 97 pickup. I want to put an MSD box that I have sitting around on the truck until the S10 is ready to run. If it makes an improvement I will likely buy a new one for the S10 and leave this one on the 97. But what about spark plugs? I mean MSD says in their instructions about opening the gap due to the better spark now present. But you can't regap platinum plugs. Or at least are not suppossed to. So wtf would be the right way to go on a 97 350? I mean, stick with stock plugs? Run older non-platinums at a bigger gap(and change them more frequently)? or some other option?