Cowl Vent, rust, and assorted questions?

[darrellyates]

Ok guys, I'm new here so be gentle. I have a '70 C10 that I'm building as a '68 slant nose. Any issues with sealing the vents on the inside, using POR 15 inside the airbox, and then sealing the cowl vent? The drains are open and clean. I've already put a floor in, fixed the inner kick panels, lower door pillars, rear corners, outer rockers.... You get the idea. I was following the rusty air vent thread, but didn't see the problem answer as I intend. Thoughts and advice?

Also, I have a Scott's new frame, and a new LS3 with a 4L60E, and a bunch of other new stuff to go in. Trying to it right. Cab repair is taking forever...

Thanks in advance...

[swamp rat]

Poor 15 should be fine for surface rust but you still want to repair any badly rusted areas inside the cowl first, be sure to prime, seam sealer, then paint.

[darrellyates]

I sandblasted the cab, and removed all the rust. There was pin hole rust-thru on the outer, lower side of the air box that was removed, then made sure the drain was open, and painted everything I could reach inside with POR 15. I re-welded the metal, and have it in wash primer first, doing the smoothing and then will prime and seal before paint. I am hoping I won't get enough water around the sealed cowl that will not run down and out the drains, and I can just weld up the actual vent openings to the inside???? If I can figure out how, I'll post pictures of the repair...

[GR8-68]

I just removed my cowl tonight read my build for my 68, I posted pics of the cowl removed, after all this work there is no way I felt good about not getting under there to fix any blind issues. It is not that hard to remove with a good spot cutter.

[HO455]

I did a similar thing on my Burban. I bought a undercoating sprayer with a flexible wand and sprayed everywhere I could get to. I even drilled access holes I could plug later with the factory style plugs. I figure anything I can cover with Por15 now is better in the long run. If you want more information on what I did you can check out my "Working Man's Burban" thread in the 67-72 Suburban section.
http://67-72chevytrucks.com/vboard/s...d.php?t=698377
Good luck and be safe when you're painting in confined spaces.

[darrellyates]

I believe, I can get a picture to post now.... If anybody is watching... I'll have to figure out how to get the work in order like others have done. I did seal the inner vents (welded them up actually) and will cover them when I do the interior...