The second photo is the 1970 340 block, markings are 2780930-340-6
The W2 heads are still used today on small block Mopars and make big power you can't get with almost any other heads.
I might not have everything, but yet an excellent start for an honest 550 horsepower engine.
If you're interested in buying these parts alone I may be intrested in selling them or even trading them for a street motor preferably a late hemi. Mind you, these parts aren't bought cheaply so if you've done your homework and you're ready to deal, you can call me anytime on my cell phone at 541.660.1092 I won't argue with you for any length of time and even have a crate to package them into. But be warned, I don't play games and neither should you.