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Seems like a great but simple idea. It has farmer engineering  all over it. 

I've done a compression check and all cylinders are 475-500 psi 

I don't understand the last sentence, but the image is very helpful.... you are a welcome asset here.... I think I like this idea so well because it looks like something a farmer would do.

  You have to read at full govern and load. Have a partner in the cab interpreting. Our group expected Mack E7 to stay under 6" or we would be putting sleeves in. On the 80's engines you just look at the worm for your speed-o out..LOL if you can't make the oil leak stop your crank is supercharged!!!!

An MH Magnum package Ultra-Liner is a rare truck. I'd rather see it sold to someone who will preserve it.

Seems quirky, but no, don't plug anything. Plugging would blow the water out. If you are drafting the engine back into intake remove and let hang to atmosphere......otherwise you are negative pressure.  

They don't make engineers anymore like Roy Lunn, Walter May and Win Pellizzoni.

'Godfather of the Ford GT40' Roy Lunn: 1925-2017 Autoweek  /  August 16, 2017 Celebrated engineer crosses the finish line at 92 Roy Lunn, the “Godfather of the Ford GT40,” passed away on Aug. 5, 2017, after suffering a stroke at the age of 92. His wife of 70 years, Jeanie and two daughters, two granddaughters, a son-in-law and one great-grandson survive him.  Lunn was born in Richmond, England, in 1925, one of three children. He earned degrees in mechanical and aeronautical engineering at Kingston Technical College and was a pilot in the Royal Air Force. When World War II ended, he transferred to the Royal Aircraft Establishment in Farnborough and worked on the design and development of gas turbine generators for the first turboJet aircraft. He started his automotive career at AC Cars as an engineer in 1946, and, in the late 1940s, he became the assistant chief designer (1947-1949) at Aston Martin and built two DB2s that competed at Le Mans. After three years as chief designer and engineer at Jowett Cars, in 1953, he joined Ford of England as an engineer and product-planning manager. In 1958, Lunn moved to the U.S., taking a position at Ford Central Advanced Engineering. Some of the projects he was responsible for included: Mustang I, Big Red -- the Superhighway truck and all the GT40 variants. He left Ford in 1969 to become vice president of engineering at Kar-Kraft where he oversaw the production of the Boss 429 Mustang and development of Mustang concepts with mid-mounted 429 engines. In 1971, Roy was recruited by American Motors Corporation to become the technical director of engineering for Jeep. A dozen years later, he was responsible for the vehicle that changed the automotive landscape in America and beyond: the ’83 Jeep Cherokee XJ, considered the first modern, lightweight four-wheel-drive unibody SUV. The Cherokee was the first American-branded vehicle to be manufactured in China and a huge success for AMC and then Chrysler. Over 3 million units were sold by 2001. Lunn is also credited with the AMC Eagle, the first production four-wheel-drive car. He was elevated to chief engineer of AMC and president of Renault Jeep Sport and centralized all AMC-Renault competition programs in the U.S. Lunn developed the first SCCA spec-racing car in 1983, the SCCA Sports Renault. Lunn served as chairman of the technical board of the Society of Automotive Engineers in 1982 to 1983. He was elected a Fellow of the Society in 1983. After retiring from AMC in 1985, he joined AM General as vice president of engineering to head the Humvee military compliance program for the Pentagon. In 1987, he retired to Florida and continued to work on automotive projects. Aside from sailing his monohull "Cat” boat built to his specifications, building two houses and playing golf, he authored three books: "The Oil Crisis: Sooner Than You Think!," "Globalization - A Worldwide Quest For A Sustainable Future," and "The World Crisis - It All Started With 9/11." His story about the history of Jeep is still on the drawing board, as are his tireless efforts toward designing a new "Peoples Car" out of entirely sustainable materials. After relocating to Santa Barbara, California, in 2015, he again set up a working home office and continued development of his new concepts that drew the attention of the local college, University of California, Santa Barbara. Within six months, he was a mentor to their mechanical engineering program, meeting with students weekly to advise and teach them. He was rewarded with an in-depth research project focusing on his plans for the "Peoples Car" and a 3-D model of the concept. Lunn is one of the industry’s original disruptors, the product of an inquiring mind and a relentless ability to use it. He was inducted into the Automotive Hall of Fame in 2016 for overseeing the development of the legendary Ford GT40 -- a car that won the 24 Hours of Le Mans from 1966 to 1969. He felt it was the proudest moment of his life when his peers in the industry recognized his work. His goals throughout his career were visionary, with a clear eye to the future. Lunn was especially proud of the 1967-winning Mark IV, the first GT40 designed, engineered, powered, developed and built in the U.S. "All of us at Ford are saddened to hear of the passing of Roy Lunn," said Raj Nair, executive vice president and president of North America, Ford Motor Company. "His legacy as the godfather of the original Ford GT40 was well known throughout the company, and he helped bring Ford a performance car that is just as legendary today as it was in the 1960s. The team that put together the Ford GT of today was inspired by the work of Roy and his team and we will be forever grateful for what they started. "We like to think that his GT40 and our GT of today are both cars that showcased the best of what Ford Motor Company can do." In lieu of flowers, the Lunn family suggests that any donations should be made to UCSB. Gifts will support engineering and design education of the department of mechanical engineering. Checks should be made payable to the UCSB Foundation (in memory of Roy Lunn) and mailed to Steve Ramirez, lead director, engineering development, College of Engineering, UC Santa Barbara, Santa Barbara, California, 93106. .