Originally Posted by baxsom

if you get 02-04 243 heads, they will have the hollow/sodium filled valves and you will need a different length pushrods. 243 heads from an 01 z06 will not require different rods. also look at 799 heads. they are physically the exact same as the 01 243 heads. they just came on the LS2s and are usually cheaper. the stock rocker arms will work great but looking into the comp cams trunion upgrade. if they are used heads you should at least take them to a shop to make sure that they are perfectly flat and then replace the valve seals. since you are taking the heads off anyway, might want to consider replacing the lifters and trays as well.

Originally Posted by 01CaMMMaro

Had another question... Will my current 853 valve covers work on 243 or 799 heads. if not, which valve covers will work with the 02 coil packs?

Originally Posted by baalic

Not entirely true. Not all 243 heads have sodium
Filled valves ONLY those from a Z06. Truck heads have regular valves as do GTO.

Originally Posted by 98MNBZ28

Sorry to thread hijack but didn't want to start a new thread being a lot of my questions been answered and i have a few more

I have a 99 and was looking at doing the same. Which year heads should i look for and what should i look into swapping once i get them?