Pagpasensyahan na ninyo ako ha,

was considering an engine transplant from carb to efi
(double purpose to upgrade to better engine too, from 1Litre-3cylinder carb to 1.3Litre-4cylinder Toyota 4EFTE turbo).
now a hypothetical question, if i have an efi engine but my intake manifold is made of steel, is it still possible to have SGi kit installed?

salamat po in advance.