Yes, put your husband's projected earnings from Box 1 of Form W-2 in (b)(i) of Step 2, minus the deductions noted on the line. If you can't project the earnings, just use the amount from his most recent Form W-2.
You actually don't need to list your own pension amount on the form. The form only needs the income in Step 2 as a baseline so your employer can compute what your pension withholding should be.
Your employer has your pension amount information, and will calculate your pension withholding based on what you've included on Form W-4P and the pension information it has.
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