Spreading out tax payment on capital gains and 401K distributions?

I took nearly $200k out of my IRAs and 401Ks last year due to my wife having terminal brain cancer. She passed away in November. I also sold our rental property (for a little over $300K capital gain) to pay off the mortgage on our current home. I'm retired with no debts.... should be great, right? Not so much. I completed my tax calculations using Turbo Tax and it shows that I owe over $70K in federal taxes and $25K in state taxes. I don't make nearly that much in a year on retirement. How can I spread that out or delay payment? Worst case is using a home equity loan or drawing even more from my 401Ks.