I recently got this truck. Anybody know what's going on here? Are these not the correct bolts/washers for this intake? Is this possibly the wrong intake for this engine?

The truck is an 84 f150 that came from the factory with a 460. The previous owner put this 300 in it. The casting numbers confirm its no older than an 81 but that's about all I know about this engine.

 

Looks like the securing washers might not be correct. IIRC, the washers on my engine are big enough to span the gaps. Others will know more and (hopefully) will post soon.

 

If the truck used to have a 460 V8 but now has a 300 engine (probably the Ford 300 inline-six), make sure the intake manifold is meant for the 300. You can't use an intake manifold from a V8 like the 460 on an inline-six because they're designed differently and have different bolt patterns.

 

Those look like the correct style, but maybe not the correct diameter. It having slipped off like that is definitely not good.
The 300 didn't originally come with a intake/exhaust gasket, and that one has one. So someone has had that manifold off before, and probably replaced the bolts with the wrong hardware.

The manifolds have a way of warping over time as it is due to their length, so I would imagine one of the washers not being fully seated would make it warp even more.
I would remove the manifolds and have them planed flat by a shop.

Then, I'd suggest replacing the bolts with 2 1/4" Grade 8 studs, getting some thick heavy duty washers, and reinstalling with a good gasket. (I prefer the Remflex 3005)

These are the washers I used on mine and they're very solid:
I got a mix of 1/2" and 9/16" washers to be sure they all fit correctly.

https://www.nutty.com/washers/grade-...-flat-washers/

 

They don't use gaskets for the intake or exhaust manifold?

 

That surprised me, too. Really AB?

 

I've never seen it myself, as all the ones I've worked on have had hundreds of thousands of miles on them, so they've been replaced.
But it's been discussed many times over the years when the gasket comes up.
From what I recall, they used some kind of graphite paste to seal them at the factory.

Gaskets are just much easier at a later date.