I didn't memntion that the engine is married to a WC T5 5-speed and going in a 65 Ranchero. I've had 3 TDI Jettas and miss the milage. As a hot rod guy I really hate commuting with something as ordinary as my Miata and decieded to build a fun milage machine. So far it has 4 wheel disk brakes and AC. The only modifications to the engine would be to increase milage and maybe mild performance. I've owned a 82 300D turbo sedan and the performance was ok even with the 3 speed auto trans, so I figured a figured a 1200lbs lighter car and a efficient 5 speed manual trans ought to be much better. So what I would like to know what reasonible mods will increase milage and maybe a little performance. Thanks, Zeke