Rare Video of 503 Running - The 1947 - Present Chevrolet & GMC Truck Message Board Network

C10 - C90 Bill · 10-27-2019, 08:51 PM

https://www.youtube.com/watch?v=FQwAiOW-erI

**Pvmt-Pndr** · 10-30-2019, 02:07 AM

That sounds awesome. Thanks for sharing! In a quick search I didn't find much on the 503. What were the power specs?

**special-K** · 10-30-2019, 06:11 AM

Thanks for sharing. I'd like to hear one running a truck. I love the old truck 6s

C10 - C90 Bill · 10-30-2019, 08:21 AM

I don't know much about the 503, except our local Fire Truck had one. It was in an Advance Design GMC, not sure of the series, but probably one of the largest available. The distinctive sound to it was so unique that I could always tell when it was leaving the station before it even rolled out the door, never mind the siren. I believe they were loaded with torque.

I originally posted it as a video, but was told that some members were having trouble getting it to open and a Mod changed it back to a link.

C10 - C90 Bill · 10-31-2019, 07:56 PM

Found another.

This one has a non-original Holley Carb on it, but still sounds sweet:

You Tube

10-27-2019, 08:51 PM	#1
C10 - C90 Bill Registered User Join Date: Nov 2001 Location: Moneta, VA USA Posts: 3,088	Rare Video of 503 Running https://www.youtube.com/watch?v=FQwAiOW-erI __________________ '60-'72 Chev/GMC Fan GMC 9500 Fan Detroit Diesel Fan Last edited by Palf70Step; 10-28-2019 at 08:53 AM.

10-30-2019, 02:07 AM	#2
Pvmt-Pndr Registered User Join Date: Jun 2017 Location: Temperance Michigan Posts: 375	Re: Rare Video of 503 Running That sounds awesome. Thanks for sharing! In a quick search I didn't find much on the 503. What were the power specs?

10-30-2019, 06:11 AM	#3
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: Rare Video of 503 Running Thanks for sharing. I'd like to hear one running a truck. I love the old truck 6s __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

10-30-2019, 08:21 AM	#4
C10 - C90 Bill Registered User Join Date: Nov 2001 Location: Moneta, VA USA Posts: 3,088	Re: Rare Video of 503 Running I don't know much about the 503, except our local Fire Truck had one. It was in an Advance Design GMC, not sure of the series, but probably one of the largest available. The distinctive sound to it was so unique that I could always tell when it was leaving the station before it even rolled out the door, never mind the siren. I believe they were loaded with torque. I originally posted it as a video, but was told that some members were having trouble getting it to open and a Mod changed it back to a link. __________________ '60-'72 Chev/GMC Fan GMC 9500 Fan Detroit Diesel Fan

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