Ok, I know that the b18c 94-97 'gsr' complete changeover from H-motors is a b18c sir-g. What, if any, are the key differences in these engines other than thier country of manufacture and the different compression ratios from usdm to jdm. I plan on turbo, hondata, lots of other goodies, but I want to make sure all my planning and parts lists will work for this engine. Lots of GSR aftermarket parts already here--should I get this engine, or should I look for a usdm gsr?