Inliners International Forums General Discussion Engines 292, to be or not to be?

I have seen the comment that the best upgrade is to more cubic inches. So I have a shot at a 292 motor in a van. I have two cars, a'49 Fleetline and a '49 Suburban. I am going to put a warmed over six in one, if not both,of them. Is the 292 the way to go? I'm thinking, 3x2,280 cam, Hei, headers, hooked to a T-5. Is there a better motor for my Fleetline? I see much talk about the 250, are parts the same enough to be used on both? I'm looking for reliablity and economy with a little punch now and then.

Any guidance would be helpful as I am new at this.