Besides headers, and carbs... you can likely have the cam hard welded and re-ground. The Toyota intake and exhaust ports of the day really are quite poor, sensible porting* could allow it to breath MUCH better.
http://i204.photobucket.com/albums/bb12 ... CF6542.jpghttp://i204.photobucket.com/albums/bb12 ... CF6552.jpgYou also can have the block decked some, this should raise compression a decent amount
* - I do porting for a living... you aren't too far away(I'm in PDX). If you want I'll be happy to look @ it and tell you my professional opinion