L31 5.7 or newer 5.3 Vortec (pics of truck progress included) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

NastyNate32 · 06-18-2014, 03:07 PM

I bought a 97 vortec/4L60E combo off a guy but the motor is no good and I've already bought a harness and ECM for $150. My options are to either buy a crate motor for the 97 which is $2000 for a long block from Summit or Jegs, or take my chances with a newer 5.3 L from a salvage yard or individual. I've found a few of them for sale as cheap as $600, most have about 120k miles on them.

What's the benefit of going to a newer 5.3L over buying a crate motor for the older 5.7L? I had the motor and transmission already mocked up and everthing so the mounts are already there for my older vortec. Just looking for some sage wisdom here...

Here is a few pics of where I'm at btw for you picture mongers like myself. It's a former longbed, dropped 4/5:

06-18-2014, 03:07 PM	#1
NastyNate32 Registered User Join Date: Jan 2013 Location: Nowata, OK Posts: 29	L31 5.7 or newer 5.3 Vortec (pics of truck progress included) I bought a 97 vortec/4L60E combo off a guy but the motor is no good and I've already bought a harness and ECM for $150. My options are to either buy a crate motor for the 97 which is $2000 for a long block from Summit or Jegs, or take my chances with a newer 5.3 L from a salvage yard or individual. I've found a few of them for sale as cheap as $600, most have about 120k miles on them. What's the benefit of going to a newer 5.3L over buying a crate motor for the older 5.7L? I had the motor and transmission already mocked up and everthing so the mounts are already there for my older vortec. Just looking for some sage wisdom here... Here is a few pics of where I'm at btw for you picture mongers like myself. It's a former longbed, dropped 4/5: Attached Images



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