91 EF to 91 LS swap HELP!!

[eman13]

91 EF si to 91 LS what harness can i use and which ecu,ls plugs dont fit only one big round plug on the passenger side . Do i need to wire anything . sorry about this stupid ? but I'm new at this

 

[blasterman87]

use the stock harness if its a si or hf. if its a dx then convert to mpfi and still use the stock harness...

 

[eman13]

which ecu can i use? ls or ef

 

[blasterman87]

ls, always use the ecu for the engine. and yes it will plug right in

 

[phyregod]

Use the Si engine harness and the LS ecu. Everything will plug right in.

 

[eman13]

Thanks for the help , I appreciate it .