What would the downside be if 90hp injectors were installed?

Looking at mileage, heat, power, smoke.

I have little to no smoke now,, power some but not like the other truck with a stock turbo, heat is a lot better with the 464, mileage is a solid 1-2 miles less with the 464 and stock injectors vs stock turbo with 50hp injectors.. mostly when towing.