You don't absolutely need the 1g head for the manifold swap. I hope someone else chimes in here. Scroll way down to the bottom of this link and read/compare. When your guy says welding, he must be referring to the map sensor mount that's located on the 2g intakes. I'm confused on your one sentence where you think it's 7 bolt head and off a 1g. I don't know if 7bolt heads came on 1g's. That question is more for a pro on here. If you find out you have a 1g head, yeah put the intake on but if it's the smaller port 2g head I guess find out from someone on here if it's actually worth it if you don't port the 2g to match the 1g mani. Nothing seems to be a direct swap to me anymore. 1 upgrade seems to lead to 3 to 5 other upgrades. For example: I think the 2g coil pack mount is different than a 1g, so that's another thing you have to do. By the way- I went with the 272 cams. I did about a months research on cams especially the Forced Perf. FP2 cams. Sent numerous emails to FP and never got one in return(a return customer too), so i said fuck them and went to the HKS 272's. Probably the best move i did anyway.
http://www.roadraceengineering.com/1...waptechtip.htm