Picture of the still sticker. It's a 96 4.6 and being so late in the year prob a 97.

 

I'm guessing by the picture that this is the info from the P71 engine. If so, which engine do you have? I know it's a 4.6 but is it a Romeo or Windsor? If you don't know, count the drivers side valve cover bolts. 11 or 13? These engines share a platform, but have numerous heads up differences as well as some lower pieces. You will need to know this when you need parts later also.

If this is a 97. then you didn't gain anything except another 4.6. In a truck it doesn't give it more power, actually no gain or loss. Did you swap the intake manifold for your truck one or did you do the CV as a package?

 

I'll have to count the bolts and will get back to you.
The truck needed a new engine which is why there was a swap. Not too sure if the original was a 4.2 or 4.6.

I recall that we wanted to use the aluminum intake but we stuck with the plastic one and this engine has the performance heads, iirc. We didn't use the aluminum because the intake didn't match up to the headers.
We actually have another 4.6 in a cart at the house we bought. Previous owner put the aluminum intake on and water poured out the back because the intakes are different

 

You've pretty much described the reason for the intake leak. The CV vs Triton engines use different gaskets, and will leak when you try to use the wrong one in the back of the engine,. You match the gaskets to the intake, as the heads have the same porting. Using Ford gaskets for the intake is a good idea, IMO. I've had problems with Felpro and McCord in this area. I learned to use the oem intakes the hard way.

 

That number, in your picture, is for a 1997 F150 Romeo engine. It is actually 6G840AA for your reference.