Might not be neccesiarly related to 4AGTE, but I think Tim.duncan took through his AE86 4AGZE through. Thinking more in terms of forced induction motors.
Might help to list what car you have aswell. Thinking that an AE86 could of had 4AGE / EFI stock, where if its E7 class, it might be a different story.
As much as I know Regency isn't a big help, tried ringing them about the conversion?