Braggin on the LS engines is NOT the best way to win friends & influence people, on a Pontiac forum, IMO.
I don't care if they make a thousand hp, & get 50 mpg. I don't wanna see anything but a Pontiac V8 in one of the old Pontiacs that came with a Pontiac engine.
If you want an LS engine, go with a body that came with an LS engine. There are LOTS of sites where they'll tell you everything you need to know about LS engines. You can find LOTS of recipes. And, there are plenty of cheap parts available for 'em.
Don't know too many guys building a Pontiac engine in order to get high fuel mileage. I think most street guys do it for the low & mid range torque. And lots of street guys love to hear a good Q-jet carb kick in.
BUT, as has been said on this and most other car forums, MANY times, it's your car & your money, so build it like you want it.
Just don't expect ALL older Pontiac guys to like the idea of an LS engine in an old Pontiac body.
No personal offense meant, at all. Merry Christmas !