Are you a Ford F150 fan? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it's a great place for Ford F150 Fans to meet online. Once you join you'll be able to post messages, upload pictures of your truck, and have a great time with other Ford F150 fans. Whether your an old timer or just bought your F150 you'll find that F150Forum.com is a great community to join. Best of all it's totally free!
On my '91 300, the valve is on the back of either the head or the intake manifold. I'm pretty sure it's the head, and it was a PITA to reach. That may give you a starting point just as somewhere to look
1991 F150 XLT Lariat - 300 I6/E4OD, 2 Wheel Drive, Bright Regatta Blue Metallic - SOLD