IF I lived in a state where smog laws were slack and IF my local mechanic thoght smog laws were useless , what emissions devices could I take off to add power. Also looking to add room for mods. Not worried about gas mileage, car is just toy for an old man.

 

From one old man to another, the quick answer is "nothing".

Because that isn't what's holding you back right now. From the FAQ forum, https://www.thirdgen.org/techbb2/sho...hreadid=261488 :

"If you want to improve the performance of an LG4, you do the following: Replace all of the exhaust with headers, y-pipe with 2-1/2" downpipes to 3" at the cat, 3" cat, and 3" cat back to 3" inlet muffler (single 3" outlet or 2 x 2-1/2" outlets is your choice). Replace the cam with something with a little duration and lift (the Crane 2050 worked well in mine). Replace the valve springs with something that can handle the lift of the cam. Upgrade the ignition coil and module with aftermarket pieces. Replace the single-snorkel air cleaner with a dual snorkel unit, either a factory type (Camaros), or fabricated one (see the tech articles on the Board home page or Link to Home Made Dual Snorkel Post for the latter). If you want, further improvements can be obtained by having the heads reworked for 1.94" intake valves, and cleaning up the port bowl area (do a search for porting, you'll find out what is required). Pinning the rocker studs or having the heads machined for screw-in studs is a very good idea with an upgraded cam & springs. If you want, you can put an aftermarket performance intake on it such as the Weiand Action+ or GMPP q-jet intake manifold."

After that, you put in a bigger engine.

Maybe, after that, then maybe some of the emissions devices would need to be cleared out of the way.

(My last fill-up, the gas mileage was 19.8 mpg, mostly around-town driving, a very little freeway.)