RE: throttle body spacers
 

If your talking about just the whole head no... EVO IV to VIII is the only one you can use since that 4G63 is faced the same way as the 4G64 that you have.

If you just talking parts then a Exhaust mani from a 1G or 2G Eclipse you can use but you either need to get rid of the A/C or find someone to make a new location and lines for you.

If your trying to save the A/C then you can either get a custom exhaust mani made or wait to see if the the EVO VIII mani and turbo fit... this is what I am doing but I keep hearing it won't clear the starter. I won't be able to find out until I get my turbo in.

First what is your overall goal. What hp are you looking to hit for a daily driver?