was just wonderin if any body knew if there were any differences with the efi mfi engines apart from the hole in the block for the crank sensor,and if any body out there was crazy enough to try to convert there mfi block to take a crank sensor as i've been offered a good mfi lump to replace my tired efi one.

 

the ports on the head are diffent shapes due to the injectors.. but if were just talking bottom ends then there nothing different that will cause a problem..the oil return stub in the block will be threaded but you can change that for the mfi one..(t3 turbo).... ... my fiesta rs turbo was running a s2 block for a couple of years... made a template of a efi block and drilled the mfi block... no probs..

 

if you have still got a efi block work out the spacings on the efi block for the crank hole mark them on the mfi block n drill away you will need a tap aswell cant rember what size