Setup the revenue budget defn to be associated with the expense budget

Can someone please assist setting up revenue budget defn to be associated with the expense budget ?

We are currently Implementing PS Grants; Grants module only posts Expense Budget (Cost Budget). Unlike Project Costing.

Are requirement is to post the Revenue budget also, same amount as Cost budget.

Scenario : If  $100,000 is posted as Expense budget (Cost budget posted)  then revenue budget should also get budget $100,000

Amount for revenue budget will increase as the amount for the cost budget.

Please advise!

thanks

Asim.