Help with identifying engine

Help with identifying engine

So, I just checked the cast number on the intake:
3512100

Using the link provided earlier, it´s a 1971 340-4 intake manifold.
And the heads are either from a 340 (2.02") or 360 (1.88"), but the 360 head should be easy to machine up to 2.02", right?

So, if I can just find the right thermoquad carb for the intake, it should be a nice little engine I presume?

71beater said
Thursday, April 15,1971 build date. 45th one built on the day.
The heads are only going to tell you casting # with valve cover off, but if they did in fact come off a 360, should have 1.88" intake valve. Even if they were original J heads for that engine, with 2.02" intakes you wouldn't be able to tell without pulling them off. Should have a forged crank, and your harmonic damper will indicate that, the cast damper says "use with cast 340 crank only" and has an offset counterweight cast into it.

I couldnt see any text on it.
Also not sure where the offset counterweight is, but it´s got a "dent" in it, if that´s what you mean?
See the picture, the cast dent is on the top: