ok this isn't a typical 'why should i use this or that head' or 'which flows better' but a couple questions to clear up the b16 vs. b18c questions when involving the LSVTEC 1. does it matter which b16 head? (i.e. 92-95 jdm b16a, b16a2/a3)? cause i can get an OK deal on a b16a jdm engine...? 2. is there a difference in installing the 2? some people have told me the GSR over the b16 for ease of install, this true? 3. which b16 heads DO flow better? if any? i thought they were from the same casing... 4. which one has the highest compression if using b16a2 pistons? thank you.