you're going to be very limited in choices, with a 1/2 ton truck.
you need to go with the lightest pin weight you can get.
you need to post more info on your truck, other than just the engine size.
rear end ratio, factory tow package or not, cab size, bed size, payload amount, 4x2 or 4x4 and so on.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC