A-body A arm cross shafts not all the same?

[64skylarkls1]

Please help!

I'm building a 64 Skylark and was working towards installing my after market upper control arms but found that I can't use my stock cross shafts. Looking into it further, it seems that Skylark may have been different than the Chevelles? This surprised me.

Will it work if I buy a set of Chevelle cross shafts? Is the rest geometry the same between the Skylark and Chevelle? I plan on pulling a few G's in the corners and want everything right.

Thanks,

Gene