so ive just purchased a b16a2 block with pistons, and crank out of a 2001 civic Sir. plannin on building the motor this winter for my 93 sol. lots of options come to mind when building this honda motor, just a little iffy on a few things, no boost in the plans, just a solid motor with a few tweaks. first off, i need a head, i plan on keepin it obd 1 if posisble for ease of installation. ive been told a GSR head would work and bolt right on and owuld be good, i cant see this helping power seeing as how the comb. chamber will be bigger meaning less compression obviously. another thing, running a b18 head on a b16 block, im sure its been done but which timing belt do i use, if there is a difference? and as far as ECU is concerned im assuming id use whatever ecu works with that head...? any advice or facts would be appreciated, im going to have to find a manual cause trying to find anything on my computer at my shop for a Civic SIR is impossible...according to mitchells on demand 5 not only does a 01 civic Sir not exist but neither does a 01 civic si ????? id hate to see this turn into a nightmare when it comes to ordering parts! thanx again and this is an awesome helpful site here! glad to be a part!