Hey, I was just wondering if anyone has attempted to use like a 2000+ Lexus key with transponder alarm and retrofit it to work on the early LS400's. I was thinkin if i could get a security ECU and somehow splice that into the factory 1990 LS ECU... I may have a shot at it?

Or Maybe I will just install an aftermarket alarm on it

 

ehh, hit up LMS, i talked to them about 6-7 months ago about something similar for my ucf20.

def wont be easy or cheap(at least 800 iirc)

prolly better off with a good aftermarket system.