Wolverine oil pan heater

I want to get one for my 08 2.7 4wd. The largest area is hidden under the front drive axle. The back of the reservoir well is 4x6 with 2 groves in it. Does anyone know if the Wolverine oil pan heater Model 16 250 WATTS which is 3.75 in. x 4.25 in would work on this vertical surface with the 2 groves. Thanks.

 

Here's a link http://www.wolverineheater.com/products.shtml

 

That's where I put mine. It's been on for about a year now and works fine. They say it shouldn't be on a surface that's not smoothe but I didn't see much of an option.,

 

Thanks for the reply. They told me to fill in the groves with liq. steel. Did you do that? Did you clean the surface b4 u stuck it on? If so with what? How did u route the electric line? Any info you can give is appreciated. Any mistakes you made that I could avoid? Did you order the #16? If so how did it work for you this winter? Man I'm a P.I.T.A. with all these questions. Thanks.

 

I didn't fill in the grooves. I sanded the paint off then cleaned it with acetone or denatured alchohol I can't remember which for sure. I can't remember the model but that sounds right-about the size of a deck of cards or so if I remember right.

 

Thanks. So you are worried about rust I guess. I have to fill out my profile more but it looks like you have the same truck as I do, just different year.