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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: Apr 2013 Posts: 172 Shop Shark | | Shop Shark Joined: Apr 2013 Posts: 172 | What, if any, is the difference in these motors other than the color? Thriftmaster-Gray Loadmaster-Green
1947 M15 Studebaker 454 4x4 1949 Chevy COE In the Stovebolt GalleryMore pix of the COE1950 Harley FL 1958 GMC LCF 455 3x2bbl 1961 Chevy C60 Tilt Cab 327 1966 Chevy C60 Tilt Cab 496 1961 Chevy K10 sb 292 1974 Harley FXE 1979 Chevy K10 sb 2007 Harley Streetglide I'm not that good but I'm slow
| | | | | Joined: Sep 2001 Posts: 29,270 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,270 | Here are a few differences shown in the 1955-2nd Series Truck Shop Manual Supplement and in the 1955-2nd Specifications Manual: - chrome plated upper piston ring in 235 Loadmaster and 261 Jobmaster - silchrome XCR steel exhaust valves in 235 Loadmaster and 261 Jobmaster - positive rotation type valve rotators in 235 Loadmaster and 261 Jobmaster Pre '68 Dave might come up with more differences? | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | According to the shop manual, the exhaust valves are a different alloy and have rotators on the Loadmaster, plus they have chrome plated top rings. Otherwise, they are the same.
Bill Burmeister
| | | | | Joined: Apr 2013 Posts: 172 Shop Shark | | Shop Shark Joined: Apr 2013 Posts: 172 | OK thanks for the quick response
Greg
1947 M15 Studebaker 454 4x4 1949 Chevy COE In the Stovebolt GalleryMore pix of the COE1950 Harley FL 1958 GMC LCF 455 3x2bbl 1961 Chevy C60 Tilt Cab 327 1966 Chevy C60 Tilt Cab 496 1961 Chevy K10 sb 292 1974 Harley FXE 1979 Chevy K10 sb 2007 Harley Streetglide I'm not that good but I'm slow
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