i'm with gas... then maybe depedning on what u can do or whats best on the 97, a airfilter and remove sound restriction stuff from the air box....
Also... if u want speed ofr the money u cant get cheaper then regearing it... down one in the front or up two-three in the rear..... Best dollar spent...you will lose about 5mph top speed... but all the way up to that speed itll be faster.