5.3 swap ?s - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Andy4639 · 11-21-2013, 07:17 PM

When mine gets done I will be using the same gauges as now.
www.speedhut.com stuff. GPS speedometer is dead on. No problems with it at all in a years time that I have had it in the truck.

88Ironduke · 11-21-2013, 08:47 PM

I stuffed a 5.3/4L60E combo into a 81' Firebird recently and ohhh so much fun. LS juice is addictive for sure.

I custom built the harness as I went along. The caveat for the drive by wire is the pigtail for the pedal assembly had to be lengthened out and the pedal assembly had to be modified to sit on the floor in a similar manner to the stock pedal. Most of the drive by wire setups use a separate module to interface the pedal inputs to the main ECM so plan a separate box to find a home for under the hood. Do not weld any where near the pedal assembly itself, they are really sensitive to static from a welder.

If you have the dollars to spend I HIGHLY recommend quality tail shaft adapter to give both mechanical speedo output and the digital out put the ECM requires to operate. They allow for stock speedometers to be used and make the ECM happy. Oil pans are super easy to swap, just make sure to get the oil pick up tube as they may not interchange.

It was time consuming but super easy, attention to detail. A good site for info was nastyZ28, there is a ton a engine mods going on over there. Good luck.

88Ironduke

11-21-2013, 07:17 PM	#26
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: 5.3 swap ?s When mine gets done I will be using the same gauges as now. www.speedhut.com stuff. GPS speedometer is dead on. No problems with it at all in a years time that I have had it in the truck. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

11-21-2013, 08:47 PM	#27
88Ironduke Registered User Join Date: Jul 2010 Location: Willingboro, NJ Posts: 489	Re: 5.3 swap ?s I stuffed a 5.3/4L60E combo into a 81' Firebird recently and ohhh so much fun. LS juice is addictive for sure. I custom built the harness as I went along. The caveat for the drive by wire is the pigtail for the pedal assembly had to be lengthened out and the pedal assembly had to be modified to sit on the floor in a similar manner to the stock pedal. Most of the drive by wire setups use a separate module to interface the pedal inputs to the main ECM so plan a separate box to find a home for under the hood. Do not weld any where near the pedal assembly itself, they are really sensitive to static from a welder. If you have the dollars to spend I HIGHLY recommend quality tail shaft adapter to give both mechanical speedo output and the digital out put the ECM requires to operate. They allow for stock speedometers to be used and make the ECM happy. Oil pans are super easy to swap, just make sure to get the oil pick up tube as they may not interchange. It was time consuming but super easy, attention to detail. A good site for info was nastyZ28, there is a ton a engine mods going on over there. Good luck. 88Ironduke __________________ Retired USAF - No rockets, no mortars, no bad guys shooting...No stress!!! My Build Thread: Project 72' Green http://67-72chevytrucks.com/vboard/s...d.php?t=587932

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