Well, putting my hand over the air intake, hidden behind the grille, w/the engine running and their is quite a bit of suction, will definitely need some type of mesh for it to keep the big stuff out of the filter. I am kind of an appearance guy, I loved the way the billet grille looked on my '93 E150, totally transformed the front, in my eyes, cost less than $70.00 for the grill and an hours worth of work, piece of cake and w/you guys w/'92 and up, not sure how many years, but I think it is a worth while mod, just my opinion.
Now, up to '91, I believe, it is a 1 piece grille, which includes the headlight surround, I looked all over and no one makes anything for the '90, other than stock. Now the '90 series F150 is a different story, much like the '92 and up E150 you can get a billet grille which is what I bought and am adapting to my I piece '90 surround. I am very close to being done, may install it tomorrow and at this time am very happy w/the look. When all is said and done I think it will look very good, take care of the ugly, in my eyes, front grille and put a smile on my face every time I look at it and all for about 10 - 15 hours worth of putzing, would be a lot faster next time, and about $80.00 in materials. If the grille had not worked out I was considering one of the many styles of heavy mesh, chrome or black, w/any number of designs, to fill in the area I removed.
![Very Happy :D](./images/smilies/icon_biggrin.gif)