Mods for a 95 3.4 dohc engine

Anyone know what kind of mods can be done in a 1995 z34 Monte Carlo?
I would like to do a few things to give it a little more power and improve the miliage a little. I don't know what to do because of the lack of space under the hood. Any help or ideas are greatly appreciated.

Thanks, Black Monte

hey try mymonte.com for stuff like that. and also try and cold air system or detailing the motor. nos or little goodies aer good to