The newest Silver 4-53T puts out 185 HP at 2500 rpm and 435 ft lb at 1,500 RPM.
don't have a real MPG figure yet, with a 7,000-8,000 lb truck I'd hope to see 15-18 mpg.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-