Dear Welder Series… What Steel Should I Use?

Dear Welder Series…
Hello,
I have a 1957 Chevy Pickup that I need to get running before another baby comes in June 2018. One of the things I need to do is put a new chassis under it. Someone did a Camaro front clip on it before I bought it, and after doing some research and talking to people about it, and taking multiple measurements, I do not feel confident in how the clip was done. I actually have a brand new (covered in dust) Mustang II kit from a local company in Ontario, California sitting in the shed, problem is I need new rails to attach it too.

What type of steel would you recommend for making new rails out of? I have read a lot of resources that say “mild steel” but I am looking for more specifics like A-36 plate or A1011 Grade XX pickled and oiled, or perhaps some other awesome stuff I don’t even know about.

I know it is probably a dumb question because in essence, helping me does nothing or very little for you. Regardless, I appreciate it and hope you will consider getting back to me.

Thank you,
David

Dear David…
Hi, David.
The tubing for this is called Hollow Structural Section (HSS tubing). Specific info is at https://en.wikipedia.org/wiki/Hollow_structural_section. 2×5, 1/8” or 3/16″ wall will work well.

We suggest a 60” track width for the ’57 Chev pickup. You might want to confirm that the kit you have is going to give you that track width. If the lower control arms are stock length, the crossmember pivot holes should be 26-1/4” center-to-center.
I hope this info helps. Thanks for thinking of Welder Series.
Paul Horton

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