silvertop 4ages are all afm, the ae111 blacktop 20v is the map sensored version. club4ag and also this site i think have the ecu pin-outs for these engines. i think it'd be easier to just use the complete loom and ecu from the 20v, which hopefully came with an air flow meter. also i doubt the 16v ecu would be able to run the silvertop to it's potential, if at all.