You don't need a NBS- new body style 99-07. Radiator. The stock radiator works just fine, you may want to upgrade to a v8 radiator though and you can use a stock fan shroud but it's a good time to switch over to electric fans. They can add the needed wires when they build the harness.
97 RCSB . 2WD . 5.3 . 4l60E . E-FANS . PNP 706s . TSP 228R . 3600 STALL . HD2 . VETTE SERVO . 3.73s . 2" DROP
TURBO IN THE WORKS
I used ebay electric fans for my 5.3 swap in my 1994 obs. I trimmed the fan shroud a bit and retained the original V6 4.3 radiator. U can rewire the original uncut LS harness using the lt1swap.com website. On the same site he removed my vats for $75 with about a 7-10 turn around time. I emailed him a few weeks later after I finished the swap cause I had a few bugs and he keeps record of it. He was able to go back and verify what he tuned on the pcm.
I am a little slow getting going here. Seems several places make the engine mounts. Looking to retain the factory A/C so I am checking into that. One thing I haven't been able to find much information on is the transmission. Aas seen in the above pics it's the 3 piece 4l60E. Can I just switch the bellhousing over to the "LS" style or do I still need some kind of adaptor? I've read varying opinions on this. Some say input shafts are different and torque convertor spacing is different, etc. Anyone here done this yet?
You'll have to use the flat 6.0 flex plate with a spacer and probably elongate the torque converter holes. Thats the only way that trans will work behind the ls engine. It's cheap and easy. Factory a/c is easy to keep as well, not sure what compressor your truck has but there are kits out there to keep it. I used dirty dingo DD2550C mounts. Worked perfect.
97 RCSB . 2WD . 5.3 . 4l60E . E-FANS . PNP 706s . TSP 228R . 3600 STALL . HD2 . VETTE SERVO . 3.73s . 2" DROP
TURBO IN THE WORKS
I have heard Dirty Dingo mounts work well. I just made a deal to get rid of my daily driver 2012 Jeep Patriot (what a P.O.S.) so the $ I have left over from paying my loan off should more than take care of this swap. I planned on having the tranny rebuilt since it was out. Should I just switch it over to a different one that is more applicable to this application? I have not had a wire harness built yet either. Planned on going with a Nelson one. Any suggestions?
If you have the money ($950+) I say go for the Nelson harness. But if you want to try and save money, you can find a junkyard harness and have it modified or take the time and research how to modify it yourself. Either way you're going to have a standalone harness with minimal connections to plug into the body. As far as the trans, I would personally find a 4L65E or 4L80E, cuz even a rebuilt 60 probably wouldn't last you too long especially after modifications.
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