[RichardJ]

The integrated head with the Pulsair emission crap hanging all over it and a 2bbl carb appeared in 1979 and they began calling it a 4.1 lt engine. They started calling the 292 a 4.8 engine but it did not have the pulsair head.

All 194, 230, 250 and 292 are considered thin wall casting. In Leo Santucci's book, he states that "no particular year or series is strucurally superior, but some racers prefer the '63-71 blocks". That's good enough for me.
The thin wall casting means that if you are boring out close to .060" or more you must check for core shift and that means on any block.

If you choose to change to an earlier head you can use any 230, 250 or 292 head, '63 to '78. The '60s heads will have large spark plugs with gaskets and the later '70s have the smaller tapered seat plugs. Some of the '70s heads will have an extra hole above each exhaust port for AIR smog pump. Plug the hole with a bolt(s) and all the heads will fit and peform the same.
All the factory manifolds for these heads are for 1 bbl carb. You will need an exhaust manifold to fit this head.
There are many aftermarket intake and exhaust manifolds for these heads.
There are no aftermarket parts for the integrated head.