I already know how to build the ls/vtec conversion using the b16a1 cylinder head. What I'm wondering is if I have to prep the LS block different if I were to use a GSR head instead of a Si head. Will I still have to drill out the dowel pin holes? And when i go to tap the oil line will it be in the same place?

 

yes with the dowles,yes with the external oil line. the only diffrance is you will get .2 comression more than a b16a.

 

Hmmm i think i'll just go with the b16a1 head and have 20 milled off the bottom of it. Also for ls/vtec with a 95ls if i were to use a Si cylinder head which ECU would be good? Is there someplace that sells custom ls/vtec ECUs.

 

94-95 GSR ECU is your best bet.