Does your $75/100k budget include the $24k of mortgage payments? If it does, then your budget shrinks dramatically in 10 years.
When your SS/pensions kick in, that income alone will cover $70k/year of spending. That means your personal investments need to cover you for ten years, and then provide a smaller income for the rest of your life.
Let's run some numbers, working backwards.
Year 10: your spending will be $76k ($100k -$24k mortgage). Your pension and SS will cover $71k of that, so you need to withdraw $4k/year from your own assets. By the 25x rule, you'll need $100k invested to cover that $4k/year.
Years 8-9: spending is $100k, pensions and SS cover $31k of that, and you'll withdraw $69k/year
Years 4-7: spending is $100k, your wife's SS and pension cover $25k, you'll withdraw $75k/year
Years 1-3: spending is $100k, you'll withdraw that much each year
Totalling that up, you need ($100k + (2x$69k) + (4x$75k) + (3*$100k)) = $838k total invested. You have roughly double that, so you have enough in assets, even if you only assume keeping-up-with-inflation returns.
That said, your asset allocation needs prompt attention
1) As you already recognize, a huge percentage of your portfolio is in a single company that just laid you off. I'd strongly suggest you sell that stock and plow the proceeds into an index fund ASAP.
2) The above calculation on how much money you need assumes that the $100k that's still invested at age 67 is in index funds.
3) You're really heavy on bonds, way beyond conservative.
My conclusions?
1) Yes, you have more than enough to pull the plug today. And you have plenty of backup options.
2) Mandatory: shift that company stock into an index fund ASAP
3) Suggestion: shift a significant portion of your bond holdings into index funds. Maybe leave enough in bonds to cover your first 3 years of expenses?
4) Suggestion: stocks are better long-term, so don't sell them in the short term to cover your expenses. For the first several years, sell the bonds to cover your spending, so that your index funds can do what they do best: long-term growth.