Well, that's what it would appear to be - In any case, you have a good foundation. I would strongly recommend ditching the timing set and installing double roller type. I have never been a big fan of the nylon gear that GM used to quiet things down a bit. The come apart and especially after sitting as long as this one has, I'd swap that out.

As to earlier post, re; windage tray bolts - another HP indicator. I too have seen them on 302 DZ motors and HO 327's.

All good.