The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Whats your impression of a 5.3L LS motor in these trucks?

BIGBLU 72 · 11-26-2012, 02:51 AM

What I plan on doing is a 5.3/t56 and I KNOW a old style SBC won't touch my gas mileage. I know I'm not going to have the grunt of my 406 but when a 5500+lb stock Silverado SS smokes my 68 w a 406 everytime it's hard to Make an argument. The 406 gets 8mpg the SS gets 17 highway and it's AWD. Def not pullin the 406 to swap a 5.3 but a second 67/72 is in the future. My uncle put it best "I love my 350 in my 72 (Vette) but its a lot more fun roasting the tires then gettin 30 mpg in my 04 (Vette)"
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11-26-2012, 02:51 AM	#118
BIGBLU 72 Registered User Join Date: Dec 2008 Location: Ashland, KY Posts: 700	Re: Whats your impression of a 5.3L LS motor in these trucks? What I plan on doing is a 5.3/t56 and I KNOW a old style SBC won't touch my gas mileage. I know I'm not going to have the grunt of my 406 but when a 5500+lb stock Silverado SS smokes my 68 w a 406 everytime it's hard to Make an argument. The 406 gets 8mpg the SS gets 17 highway and it's AWD. Def not pullin the 406 to swap a 5.3 but a second 67/72 is in the future. My uncle put it best "I love my 350 in my 72 (Vette) but its a lot more fun roasting the tires then gettin 30 mpg in my 04 (Vette)" Posted via Mobile Device __________________ 68 C10 LWB 2/4 drop 406/th400/3.73posi 04 Silverado SS LQ9 6.0/4L65e/4.11posi AWD