Nerd Rods chassis-DIY 1955 2DR Hardtop

[JJ55]

She sent it, theirs an album that's titled Jason's 55 Chevy frame

Send me an invite to her FB account. Nick Prime in Forney, TX

[chevynut]

The rear knuckle is supposed to sit slightly behind the center section. In other words, the halfshafts point outward and slightly back.

IMO this is the problem with trying to build a frame without a jig...you never know where things are going to end up. Also, I never have liked bolt-in k-members. GM used them, but they had braces in front and behind of the k-member to the frame.

Hope it all works out for you. I would check the 115" wheelbase and the squareness and flatness of the frame before I did anything else.

[NickP]

Looking very nice Jason. What are the two items, top and bottom, bolted to the front of the chassis? Is this some type of jig to locate members prior to welding?

[JJ55]

A drawing would great! when I bought the frame Russell was still working on drawings but I still haven't seen them, not saying he's not helpful but I prefer drawings

Is something not lining up? Somewhere on the chassis, there should be some type of reference mark or set of marks that shows where the front axle CL is or a relationship to it. On GM's tri five chassis there are a set of holes that lie under the upper control arms forming the gage hole centerline. I doubt there is such a reference on your chassis but if there is, the front axle center line is two inches toward the rear and 117" to the rear from that lies the rear axle centerline. Let us help you out on this. Some here know the drawings by heart. I'm unfamiliar with your frame and its design but as a simple reference, from the center line of the lower radiator crossmember it's 13.380" to the front axle centerline. I have the dims on AutoCAD if you need.

[JJ55]

Yes the kit came with a few jigs and a ton of pieces I've done more work on since those pictures, plan to update Facebook tomorrow

Looking very nice Jason. What are the two items, top and bottom, bolted to the front of the chassis? Is this some type of jig to locate members prior to welding?

[NickP]

A drawing would great! when I bought the frame Russell was still working on drawings but I still haven't seen them, not saying he's not helpful but I prefer drawings

Do you have AutoCAD or do you want it in a ".pdf"? email address? Please remember, all my drawing shown is x and y Dims, no z and no placement of any C4 suspension parts.

[chevynut]

Somewhere on the chassis, there should be some type of reference mark or set of marks that shows where the front axle CL is or a relationship to it. On GM's tri five chassis there are a set of holes that lie under the upper control arms forming the gage hole centerline.

We cut that datum hole off of our conversion frames, but we use the bumper bolt holes for reference locations, as they were specified in the GM drawings from the datum. They are actually pretty accurate, more so than the body mounts since they're punched into the frame rails along with the other features.

Some here know the drawings by heart.

I almost do.

Without bumper bolt holes, datum holes, or anything else to go off of maybe the best bet is the body mounts and radiator support. It's kinda hard to accurately measure the axle locations, but it can be done with a plumb bob and marks on the floor. If it's off, I would suspect more things wrong with the frame.

[NickP]

We cut that datum hole off of our conversion frames, but we use the bumper bolt holes for reference locations, as they were specified in the GM drawings from the datum. They are actually pretty accurate, more so than the body mounts since they're punched into the frame rails along with the other features.



I almost do.

Without bumper bolt holes, datum holes, or anything else to go off of maybe the best bet is the body mounts and radiator support. It's kinda hard to accurately measure the axle locations, but it can be done with a plumb bob and marks on the floor. If it's off, I would suspect more things wrong with the frame.

That's what bothers me too Laszlo, no reference points to go from.

[JJ55]

The frame is square and flat! great that I had a 6'X 12'x 2" thick machine ground table to build it on but not 100% sure on the wheelbase, I'm hanging the front suspension tomorrow afternoon. I welded my K member in place, no bolts

The rear knuckle is supposed to sit slightly behind the center section. In other words, the halfshafts point outward and slightly back.

IMO this is the problem with trying to build a frame without a jig...you never know where things are going to end up. Also, I never have liked bolt-in k-members. GM used them, but they had braces in front and behind of the k-member to the frame.

Hope it all works out for you. I would check the 115" wheelbase and the squareness and flatness of the frame before I did anything else.

[JJ55]

Pdf please, Jason.Johnson@srpnet.com

Do you have AutoCAD or do you want it in a ".pdf"? email address? Please remember, all my drawing shown is x and y Dims, no z and no placement of any C4 suspension parts.