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67chevysupercharged · 03-14-2015, 01:53 AM

Hey all,

I'm getting to close to finally installing an ls engine into my 67 short bed but I'm having a dilemma on trying to figure out which route I want to take. I have both a complete gen 3 6.0/4l80e and a complete gen 4 6.0/6l90e combo that I got together in a package deal. The plan for the truck is to be a fun driver that will see the track a few times a year. I originally planned on running the gen 4 due to it having the better flowing l92 cylinder heads, but am concerned about the lack of aftermarket support for the 6l90e and wonder if it will survive behind a higher horsepower application. Any and all help is greatly appreciated.

Thanks,
Zak

03-14-2015, 01:53 AM	#1
67chevysupercharged Registered User Join Date: Sep 2009 Location: Hobbs, New Mexico Posts: 48	6l90e or 4l80e? Hey all, I'm getting to close to finally installing an ls engine into my 67 short bed but I'm having a dilemma on trying to figure out which route I want to take. I have both a complete gen 3 6.0/4l80e and a complete gen 4 6.0/6l90e combo that I got together in a package deal. The plan for the truck is to be a fun driver that will see the track a few times a year. I originally planned on running the gen 4 due to it having the better flowing l92 cylinder heads, but am concerned about the lack of aftermarket support for the 6l90e and wonder if it will survive behind a higher horsepower application. Any and all help is greatly appreciated. Thanks, Zak __________________ 71 Longhorn 402, PS, PDB, AC, Tach, Posi 67 SWB 6.0 LSX swap, 4/6 ECE Drop (Work in Progress) 2002 Victory Red ECSB Silverado 5.3 (DD)