Ideas needed on how to fix this

[made2drag]

you can also get creative with pieces you might already have at the house. ive got a spare tailgate left over from my 93 yukon...instead of scraping it i can trim pieces using the tailgate's curves and make them work for small patches...already galvanized from the factory too.
another thing ive seen is...people who want to tub their firewall for eng clearance...use the natural curves from a wheel barrow for a nice stock looking look.