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Old 12-19-2012, 10:44 AM
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98 350 vortec engine swap 454 vortec engine swap wiring

My 98 k1500 350 vortec 4l60 suburban just spun a main bearing. I've seen this topic before on many sites but it always goes cold with people arguing about its a bad swap or do a LS swap instead and never answer the guys questions. I have a 454 vortec with 18k miles on it with 4l80 and its free. I know the mechanical end is plug and play for the most part aside from maybe the trans cross member and having to buy a conversion output kit to fit my t-case. I know the computers are the same with different cals. I have the 454 complete with harness and computer so a full swap is fine if i need to. Both engines are MPFI my only question is how easy is the electrical swap. I have heard that the routing of the wires is different in the BB then the SB. with the BB there's more wires that come through the passenger side fire wall as appose to the SB. Is this true? and witch ones. also will I have to change the dash harnness to make my gauges work. should I grab the newer cluster too from the BB. I'm Good with electrical just don't know exactly what to change. I've even pulled up schematics from the acdelco manuals and the wiring looks the same. I just keep hearing the routing is different. I dont have to worry about emmistions in my state. I have access to a tech 2 and a vin licenced obd2 programer. I want to have a BB for the torque for towing my all steel high 10 sec 73 nova. I have futrue BB engine mod plans for it. This is a DD and want to keep it computer controlled. Arizona truck spotless besides paint faid. I have personally replaced the rear end with a SF 14 bolt lunch box locker, replaced all wearable suspension components including gearbox and pump with an EVO steering elimination kit. Has a 6'' procomp lift with 275/70R18 10ply continental F350 take offs. Can some one who has done this swap or is knowledgeble please help me out.
P.s. asside from the junk yard hopping and looking around for a big block and pulling all the wire looms apart im stumped

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Last edited by Bobbydnovaman; 12-19-2012 at 10:49 AM.
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