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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Nov 2009 Posts: 639 'Bolter | | 'Bolter Joined: Nov 2009 Posts: 639 | Just curious. What's the physical size difference, roughly, between the 228-302 and the 503 straight six? | | | | | Joined: Jan 2008 Posts: 4,961 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,961 | The 503 is a huge, heavy low RPM engine. A 302 was used in up to 450 series. In 55 a 503 appeared in a 630 series. The hood on a 630 series is about 6 or 8 inches longer in a 630 series than a 450 series if that tells you anything. My first semi was a 550 series with a 370 V8. The 370 turned out more HP than the 503 and the 550 series uses the same hood as a 450 series. | | | | | Joined: Nov 2009 Posts: 639 'Bolter | | 'Bolter Joined: Nov 2009 Posts: 639 | As I figured. I'm looking for an engine for my truck and my friend finds a 503 and says "there you go, problem solved!" Thanks for the info  | | | | | Joined: Dec 2004 Posts: 128 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 128 | | | | | | Joined: Feb 2004 Posts: 29,799 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,799 | my friend finds a 503 and says "there you go, problem solved!" What's the price on that 503? I might be interested in acquiring it. Thanks! Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Nov 2009 Posts: 639 'Bolter | | 'Bolter Joined: Nov 2009 Posts: 639 | | | |
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