I spent $150 on complete serpentine kit and T.B. Intake, unit and computer, distributor, alternator. All from 1990 Silverado with 5.7. I did it for drivability reasons, it is not pretty, but cheap and extremely functional. Downside is (afaik
) all are long water pump setups, so account for that. If staying mechanical fan, you need a reverse one of those, and a different water pump for reverse (I still debate that to an extend if you look closely at the impellers, they mainly force water out, not around, and if they spun the other way, out is still out...).
Also with P/S pumps that are with anything remotely modern (last 30 years) they use the O-Ring fitting, so a great time to do the JGC Steering Box swap, and just use all modern hoses.
Plus the pickup system, has an a/c delete pulley option, so you if add it in later (like I did) nothing new is required, not even the belt. Plus the newer alternators that are with them are much better than the old ones. My only issue is pulley alignment, primarily around the p/s pump. I think that there are different pumps/pulley combos that seat at different depths. Also, on my setup, the A/C is high near the passenger side valve cover with the alternator on the other side with p/s pump under it. It can make running a top hose complicated depending on rad outlet location.