The head on the 292 most likely has the intake cast into it, if so, your manifolds will not fit. If in fact it has the non-intigral head, then your manifolds will bolt right up. The 292's used a bigger cfm carburetor and bigger outlet exhaust manifold. The intakes may have been bigger as well. You will be able to do the swap with out problems, it just may not run as well due to the small carb.
Over the counter replacement carbs are usually just pieces of many carbs put together to make one. If you order a 292 carb, its a crap shoot on what you will get, you could get part 230, part 292 carb. Find a original carb and rebuild it yourself to be sure you get what you want.
There is nothing wrong with the 292 smog era engines, they run really well for what they are. You can remove all of the "smog" added devices or just leave them. Swapping the heads will get rid of all the attachments. Camshafts were all about the same, so was compression, some where around 8.0:1. The cast head/intake combination work just as well as the older intakes, the problem was with the exhaust cracking from heat. All inline six heads were the same, you can not add compression or air flow with a head swap. The real early 194 ci head has smaller chambers and will raise compression a point or so, but the ports are real crappy and need a ton of work to flow as much as a stock later head, plus the exhaust had siamese ports just like the intakes do. This engine should have a HEI distributor, if it does use it.
Joe
