Re: X Member Design and Frame Bracing- '66 C10
I boxed my frame pretty much the same way you plan to. I thought about doing a tubular X-member, but decided against it after plotting it and realizing that it interfered with too many things I was planning, in particular the 4L80. To stiffen the front a little, I did down tubes from the firewall to the frame and a front motorplate to complement the existing inner fender structure.
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1963 C-10: Deluxe-optioned cab, shortbed, fleetside
Pontiac 462 ci, Kauffman D-Port alum. heads
4L80E, narrowed sheetmetal Ford 9-inch
Tubular front and rear suspension
Custom 6-piston front disc and 4-piston rear disc brakes
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