It's a turd. It has so much piston slap and blow by that it's embarrassing!! It's basically a solid engine and I don't hot rod it much so that I can make it home!
I bought a 360 block and am going to start a 408 build next winter and sell the 340 then. It's a 68 block, with X heads, but someone stuck a cast crank in it. Pistons and camshaft are unknown.
Here's a pict. Kinda ugly. You can see the mount between the header and the alternator.