I have a stock 90' L98 with IRON heads. is there any aluminum heads I can put on without changing valves or anything? just bolt em on and go to reduce weight and gain a little power? dont want to spend 800$ just wondering if anything from a junkward/ parted out car would work?

 

How much do you want to spend?

Only junkyard alum head are Vette L98 heads; hardly worth the trouble
Vortecs are the head of choice for cheap perf upgrade but they are cast iron so don't meet your criteria

 

I've got an l98 too and think I'll get a set of aluminum procomp heads from skip white

 

No point in reusing old valves, not worth the hassle new valves and rockers are not expensive

 

Only way i can see you getting aluminum heads for 800 or less is a set of L98 corvette heads...which is ok but doesnt really get you THAT much farther ahead than a set of ported out stockers. If it were me i would save until you could afford a set of AFR heads or Dart pro1's. Both are in the 1200-1400 dollar range as are most aluminum heads.