You can pull a junkyard 4 bolt main complete motor for probably 300-400? Best to try and go when there are sales! If you paid someone at a shop to rebuild it, you’re looking at 1500-2000 for a complete rebuild which may or may not include the core exchange. These are estimates based on things I’ve seen, but may vary where you are and this is just a loose baseline. But by pulling a complete motor, you’ll get brackets, belt pulleys, etc and that’s worth a lot of peace of mind. GM crate engines are $2k for a long block (which has gone up in the last few years) and that’s all you get. But you do get a warranty which is nice. If your drivetrain is solid along with your cooling and brakes, there’s no reason you can’t drive that thing for all the reasons you want it for. Nice part about building a motor is that you can change a few things for simple bolt on hardware that you’d have to buy anyways (cam, valve springs, timing chain, etc). Radiator is a few hundred bucks, exhaust can run 300-400, and no matter what way you go, there will still be a long list of littles. Fluids, gaskets, tools, back to the parts store for something else countless more times.
Both ways are good but have their limitations. You can take a risk on a used engine too, if you have a reputable seller or can hear it run first. 350s are really stout engines so many exist in used form from old projects. But it won’t be “just drop it in as is and go”, there will always be stuff to fix and upgrade.
Last edited by Deathorvictory; July 23rd 2019 8:48 pm.