Sold in pairs.

Typically used in hot rods and mini-trucks to drop the frame past the rear axle. 2-5/8″ wide outside. 6-1/2″ from the top of the original frame to the top of the notch. Made from 3/16″ mild steel.

The notch depth will vary, depending on how tall the frame rails are, and what sweep the original frame rails have. The S10 we used for our installation article, for instance, has 4″ of axle clearance with 18″ wheels when the frame is laying on the ground.

Priced per pair.

Alignment tabs. No guesswork when it comes to squaring it up. Easy to clamp while you’re tacking it together.

Weld it off the frame. The majority of the welding is done on your bench, where you can position the piece for the best weld. When you’re done welding the notch, just set it on the frame rail and weld it in place.

Sits on outside top corner of frame rail. If you choose to grind the welds, you’ll have a smooth transition from the notch kit to your frame rails.

Integral inner frame rail boxing plates. The inner plates weld to both the upper and lower flange of a C channel frame rail for strength.

Classic Trucks Magazine installed this step notch in Jim Rizzo’s ’57 Chev pickup. Check out the article: Welder Series Step Notch Kit - The Low Down On Gettin' Down Low - Installing The Welder Series Step Notch Kit - From the February, 2011 issue of Classic Trucks - By Jim Rizzo

Installing a Universal Rear Step Notch Kit

I recently had the opportunity to head over to a local garage where a “young guy” (Jeff) was installing one of our universal step notch kits. I try to keep a watch on what’s going on in the area, because there are so many top-notch shops doing top-notch work that I can learn from, but also because I like to see our parts being used!

Jeff had this S10 on the road with basically a paint job and a mild drop. When he decided to install air ride all the way around and lay frame, a step notch kit was in order. Jeff had purchased our rear four link kit and some brackets already, so it was a logical step for him to ask if we could produce a step notch kit. Up until that point, adding a step notch kit to our product line wasn’t even on the radar, but we decided we could add a few features to the basic concept of the kits already on the market, and made some up for testing.

These are the pieces required for one side. (The kit includes enough plates to notch one frame.) The plate on the right is the outside/top/bottom (you’ll understand soon), while the top left plate is for the inside and the two rectangular plates are the inner boxing plates.

Did you notice the four lines on this plate? Those aren’t just reference lines to tell you where to bend, they are actually laser cut slits right through the 3/16″ steel. At each end of the slits (and in the middle of three) there are ‘bridges’ where the material is not cut through. These material ‘bridges’ are all you’re bending, and they will hold the angle while you check it for square. All you need to bend the plate are a couple adjustable wrenches and a table or vice.

With the plate clamped to Jeff’s bench, he folded it to about 90 degrees and then double checked the angle with a square.

In this picture, you can see how the plates are bent to a perfect corner-to-corner alignment, which is ideal for welding.

You can now see how the flat plate has been transformed into the top, front, back, outside, and bottom! Also notice the tabs on the open end of the notch…

… they are also on the inside plate, which allows you to clamp the pieces together corner-to-corner.

Jeff started welding the corners with his MIG.

If you wanted to grind the weld smooth, this would be the time to do it. Jeff decided to run it as-is. Another advantage of an inside corner to inside corner weld is the option to grind it and still have lots of weld left.

Now it’s time to move over to the frame. This truck had C notches from a previous life, so we’re going to have to work around them for now. You can see the plate on the outside of the frame rail which was a part of the old C notch kit. It will eventually be removed.

The stock S10 frame has a wide upper flange that needs to be trimmed before installation. You can see how far it’s keeping the outer surface of the notch from the outer surface of the frame rail.

Jeff marked a cut line to straighten the top flange.

He used a cutting disc for the job.

The welded notch was positioned on the rail, and the bottom of the inside plate was marked and trimmed to fit based on the curve of the frame rail.

On the S10 frame, the top outside corners aren’t a sharp radius – instead, they slope down to the outside about 3/8″ from the edge. Jeff trimmed the front and back of the notches to let the outside hang down to fill the gap.

After trimming the bottom of the inside plates, Jeff leveled the notch and ran a bead along the front and back.

To make it easier to weld, Jeff bent the plates slightly so they rested on the lower flange.

Jeff welded the notch in place. Notice the C-notch is still there – we’ll deal with that in the next step.

Extend the lines of the inside of the notch down onto the rail.

There are many ways to cut the frame rail. Jeff chose a reciprocating saw and his friend Rob.

The next step is to box the rails with the included boxing plates. In this picture, you can see how Jeff welded the top and bottom flanges to the inside plate, as well as the leftover plate on the outside of the rail from the previous C-notch. Once this plate is removed, the Welder Series step notch will be flush with the outside of the frame.

With the boxing plates welded, Jeff can move on to the other side!

• Available ready-to-weld.
• Alignment tabs. No guesswork when it comes to squaring it up. Easy to clamp while you’re tacking it together.
• Sits on outside top corner of frame rail. If you choose to grind the welds, you’ll have a smooth transition from the notch kit to your frame rails.
• Integral inner boxing plates. The inner plates weld to both the upper and lower flange of a C channel frame rail for strength.
• Weld it off the frame. The majority of the welding is done on your bench, where you can position the piece for the best weld. When you’re done welding the notch, just set it on the frame rail and weld it in place.