modifications

2002 ford sport trac 181,000mi on the dash, new engine 58,000mi (still the 4.0 sohc) 2nd owner Spectre air filter 1.5 in wheel spacers Nothing else yet haven’t had for very long wanting to modify it but need to get a tuner first! Any suggestions? What’s good ways to make power on these bad boys...

I am new to sport trac life , I just bought a 07 limited 4x4 . What are some good performance mods to add?