When I bring up the ad it says $180. The '82 says $150.
On one hand- I think either of these would make good candidates for stroker builds- it wouldn't be surprising at all to see both of them need .020 overbore and neither's crank may be any good. The '82 sounds like even though it's got a decent intake it'll not have much to offer that doesn't need work.
I agree with the other accessments- I think they're closer to $100 engines. When everything's done there's not a lot leftover that's worth money. Out of the two- I'd lean toward the '77 motor is it could be had around $100-130. It's at least got manifolds on it, and if it's got good compression with just the crank trashed it could end up being a good foundation for a stroker build.
If your shopping a pull-it-yourself yard, I would ONLY consider 89-92 roller cam blocks, OR the magnum engine. Flat tappet LA blocks I wouldn't bother, IMO
