You have to remember, Trump would also like to get some deals signed. The Indians are getting 36 Rafales starting this year, so 18 PAF F-16 Block 70s won't change the balance of power, but keep it balanced, and may even incentivize the Indians to buy the Super Hornet. The Indians don't seem to be committing to any US products for their major Air force Fighter or Strike platform tenders. Therefore the US shoudl look at who is willing to buy their products.
18 Block 70s and just the SABR radars and associated avionics upgrades would be enough to give the PAF modern capabilities to match IAF acquisitions for the foreseeable future. 18 Block 70, permission to buy 42 Late model low-flight hour F-16s from other operators, and the aforementioned upgrades, along with Aim-120c7 and Aim-9X-II would be enough for the PAF. Then we would have 8 full f-16 Squadrons. Price tag would be somewhere in the neighborhood of $6-9 Billion. A steady increase in trade could cover some of this acquisition, and it is a large enough deal that it may incentivize the Trump and the US to go through with it, especially if it gets Pakistan to buy American and not Chinese.