I’m thinking about buying 22r motor for my 4Runner but I need fuel injection. How hard is it to put my EFI system onto the carbureted motor?

 

You are in the wrong forum section! If you can't figure this out how can we expect you sourced the compatible head for your 22r to 22re conversion?!

​​I digress it's passed my bed time.

There are plenty of websites and search terms that will tell you if your long block( head ) is compatible with your intake and exhaust manifold, try LCE or enginbuildermag websites..

You really didn't give us much to go on here.. What year manifold do you have and what tear head block are you working with?