93 Chevy G20 3/4 tonconversion van.
Has a 4.3L v6 that is identical to the 350 just without the 2 cylinders, rear wheel drive.
Towing a 6x12 trailer from Minneapolis to Phoenix, and it'll weigh around 3k lbs
Edit: oil was changed 3k ago, so gunna do that for sure, but new air filter + distributor cap, wires and plugs done at the same time.