Please remember that converting an employer plan account to a Roth IRA is a taxable event. Increased taxable income from the Roth IRA conversion may have several consequences including (but not limited to) a need for additional tax withholding or estimated tax payments, the loss of certain tax deductions and credits, higher taxes on Social Security benefits, and higher Medicare premiums. Be sure to consult with a qualified tax advisor before making any decisions regarding your IRA.
It is generally preferable that you have funds to pay the taxes due upon conversion from funds outside of your IRA. If you elect to take a distribution from your IRA to pay the conversion taxes, please keep in mind the potential consequences, such as an assessment of product surrender charges or additional IRS penalties for premature distributions.