No - they are preset and should not need to be gapped, because there really isn't a good way to. Usually the guys at the auto part stores are trying to BS you into buying them for the higher price. I'm gonna try them E-3's when its tune up time. But anything "platimun" should be fine. I'm also thinking of getting an MSD Blaster Coil and bigger 9-10mm wires for the hell of it.
MSD #8228 - I know it will work for '97 TJ's with 4.0L but I don't know about '98-Up. AutoZone and maybe Checker cary them in stock, so you might be able to go there and check one out first hand to see if it would fit. Accel does have a coil that is listed for 91-99 YJ/TJ - LINKY, but 98-99 will need an adapter for it to work... I think it has to do with the input pins to the coil itself, either 1 or 2. But I'm going to be getting the MSD 8.5mm wires when I upgrade the coild and plugs.which MSD blaster coil (#?) is for Jeep TJ's? is it a universal part because neither summitracing nor quadratec had the actual blaster listed for TJ's