car coming back off road soon for repaint, while its not being used i wanna also change to efi, i also want to put 16i rocker cover on, i have seen this done by using 3i inlet manifold but does it also work with said inlet on efi and does the throttle housing bolt straight on, also could this all be fitted to zvh if i decide to go down that route, any info much appreciated, thanks in advance, ps and also whats better ofab or ofac