none, really. anything good will cost you money.
for track, lose any un-neccesarry weight --> free
lightweight wheels and good tires --> at least 800
good set of coilovers --> roughly 1.2k
automatic tranny won't be any fun for this, so you'd want to go 5 speed --> 600ish at least
for noticeable power on the 5S-fe engine you'd need a lot of work, an intake and exhaust won't do you much.
don't try to track-drive a wagon... i can see the body roll being an epic issue.
for track, lose any un-neccesarry weight --> free
lightweight wheels and good tires --> at least 800
good set of coilovers --> roughly 1.2k
automatic tranny won't be any fun for this, so you'd want to go 5 speed --> 600ish at least
for noticeable power on the 5S-fe engine you'd need a lot of work, an intake and exhaust won't do you much.
don't try to track-drive a wagon... i can see the body roll being an epic issue.