If you are making a deductible contribution then it won’t matter what the source of the funds is, it will be reported as such, and added back to your AGI. Then you will be penalized because you won’t have paid so much tax (which is deducted in the calculation of your EFC). So for example a $30,000 contribution might mean you pay $10,000 less tax and social security and your EFC would then be ~$4700 higher.
The only potential way round this I’m aware of is if you have a company with a pension scheme where the contributions are by the company rather than being a deduction from income and are therefore not required to be reported and added back (although IMO this is not crystal clear).