I believe the TB on the KA is 60mm and the CA is 54mm, the bolt holes can always be drilled and tapped to fit *if they don't already (not sure )*...its just a simple 3 wire hook up:easy hardwire.

As for the MAF and coilpacks, the OEM Coilpacks for the ca16 and the ca18 (N/A and Turbo models) are all the same...so go ahead if you want. A lot of CA guys put the Z32 or RB maf in instead of the stock one. I know the stock Ca18det MAF is good up to about 14psi...but im not sure about the CA16de MAF...i wanna say its only good till 10-12psi but i can't remember. Sorry.