Well I've been so focused(mostly lazy) on my Hemi, that I've been neglecting my 4.7 work truck. So much so that I have close to 85K miles and still have the original spark plugs. Anyhoo I bought a set back when the truck had about 25K on it, and I listened to what the Autozone parts guy told me to get, which probably wasn't the wisest thing to do. I bought Bosch Platinum plugs part# 4230 I believe, will these suffice or should I get something else.....? Also what's the gap?