The pro-equity bias here is pretty interesting. The OP said nothing about wanting to maximize the value of their portfolio, increase spending above what pension & SS allows, leave a large inheritance, earn higher returns, or any other goal for that matter.
The only thing an outsider might infer from what is written is that the OP isn't comfortable with the risk profile of their current 50/50 asset allocation. And yet the advice given is near uniformly in-favor of higher equity allocations.
My advice is different. If your pension is inflation adjusted and it provides enough income to finance your desired standard of living then you don't need to own any equities at all. The question then becomes "how much equity exposure do you want." And to answer that question you'll want to first decide what you want from those savings.
If you're hoping to draw on that money to supplement your SS and Pension income you probably want more, and perhaps much more, than a 20% equity allocation.
If that money is intended as purely an emergency / safety-net stash to cover large unforeseen expenses, a 20% or less equity allocation is perfectly adequate for that purpose.
If you have some other thoughts in mind (e.g. maybe you'd like the option of spending more in the future, etc) then those goals will yield a different equity requirement.
Once you know what you want that money to do for you, the asset allocation needed to meet those goals pretty much decides itself. Then you just need to decide if you're comfortable shouldering the volatility that AA entails or whether you need to rethink your goals.
Good luck