The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

glock35ipsc · 06-08-2009, 02:25 PM

Great thread! I have two quick questions, if I may:

1) I might be getting a 91 dually with a TBI 454. Is the TBI harness that is needed for a swap a stand-alone harness, or are the parts of the harness needed part of a larger harness?

2) The 85 I am getting (avatar pic) already has had a 350 TBI swapped in with donor parts from an 87. If I put the 454 TBI motor in the 85, will the existing harness suffice? I am guessing I will need to replace the ECM with the one from the 454 truck though.

Thanks in advance!

06-08-2009, 02:25 PM	#226
glock35ipsc Next project: 1970 K10 Join Date: Feb 2004 Location: Fort Collins, Colo 80524 Posts: 6,685	Re: Tbi swap build thread Great thread! I have two quick questions, if I may: 1) I might be getting a 91 dually with a TBI 454. Is the TBI harness that is needed for a swap a stand-alone harness, or are the parts of the harness needed part of a larger harness? 2) The 85 I am getting (avatar pic) already has had a 350 TBI swapped in with donor parts from an 87. If I put the 454 TBI motor in the 85, will the existing harness suffice? I am guessing I will need to replace the ECM with the one from the 454 truck though. Thanks in advance! __________________ *Bob* 1970 Chevy K10 LWB "Goldie" 350/TH350 *next project!!* 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE Last edited by glock35ipsc; 06-08-2009 at 02:28 PM.