Leaderboard

Not sure how long the forum was down, but it was caused by a PHP error on the server. And a thanks goes out to @adamzan for bringing it to my attention.

For sure you'd need an older #1 coil. For the other coils: 2a: It's possible to swap the boots older-->newer, but you also need the spring 2b: You'd need to lengthen the boots, which would prevent spark plug contact, so this is a no-go. 2c: Since the older coils were intended for the older covers (aluminum), this is the most correct route. That's what the guy did in that Nico post (man...I barely had the truck 2 years when I was chiming in on that...how things have changed). That said, I did some R&D for you... Newer coil on left, older on right. When aligned by the mounting tabs, the older is about 1/2" longer. When aligned by boot length, they are the same length. The older coil's mounting tab sits above the plastic valve covers mounting hole by 1/2". As mentioned earlier, you can probably still fit the newer style in cylinders 2-6, but the coil has to be turned enough to avoid the mounting boss on the aluminum covers. You could possibly use a screw and washer in the boss to retain the coil to some degree. Taken apart, you can see all the parts are different. Although the spring in the older unit is quite longer, it sits deeper in the hole in the module. All the tube parts are shaped differently enough that fitment isn't great if you were to swap things around, but it's somewhat possible. With springs in and aligned by mounting tab, the older coil is still 1/2" longer. If you put the older style boot and older spring onto the newer style module, the boot fits nicely and everything else seems to be the correct length and position. Not that it matters here, but the newer boot will not fit the older module unless the top of the boot is cut off. Now, since the springs are different, I have no idea what impact it has switching it. I also don't know if you can get the boots and springs. I'd say that if you're at a junk yard and pulling them, you may as well just buy the complete coils. Although my personal opinion is that the additional cost to do this project doesn't really have much ROI, unless it's just cheaper than buying new plastic covers. Hope this helps.