Ported Cast Iron Cylinder Head

[ProjectWE4]

Hey just wondering on if I bought some Ported Cast Iron Cylinder Head from Championgn1.com and bought the GN1 Ported OEM Aluminum Intake Manifold from there too. How big of a gain in power and what are the pros and cons of doing this. Also what else would be good to get to go with all this.. Like ex. the 65mm throttle body from accufab, and what else is a nessecity for this. Also im just getting this info now so i dont have to do it later. Im also looking at doing a frount mount an a aluminum radiator of some sort. So remeber im just researching about this since the gnttype.org is down.
Thanks for any info you can give.
chris

 

[turbot2112]

do the champion heads and manifold and youre looking at a whole diffrent ball game. im just as quick at 14 pounds of boost as i was at 19 pounds of boost . i also threw a cam in it. completely diffrent car.