-GF-,
no offence but who built ur engine?won it b better 2 trust ur own builder?.....n yes,B16A's extractor won clear ur B20 block.....u need a Type R header,B18C or mayb sum aftermarket unit.....
regarding management,very subjective.wat's s spec of ur engine.wat do u intend 2 do w it?wats ur budget like?dis r questions u need 2 answer 1st.
n remember,buy cheap management now,u might outgrow it n later on spend more on new managements.....
getting an expandable management is d best bet altho it do cost more...
well,like i sed,its very subjective..
if u ask me,4 non-hardcore modded engines,SAFC/VAFC is sufficient enuff ler..n alot of ppl know how 2 tune dis gizmo....