7AFE can I use 4AFE Celica Engine

:uhoh:my engine was a 7AFE 1.8 litre engine i can get a 4AFE 1.6 litre i know I would have to try to keep the 7AFE timing cover for the crank position sensor,but you have to use your 7afe head if it has an egr valve and swap oil pumps for the CPS but I wasnt able to complete the change because the 4afe was a bad engine I should have checked the bottom end first just remove the oil pan.