For anyone considering a 4.3 V6 Chevy engine to use in their airplane, try to get a copy of a book called "Chevrolet Power" by Rich Voegelin. It was published by HP Books in 1983. Although the engine was produced long after that, this book has a wealth of technical info,dimensions,and details on the 4.3 and other Chevy engines. It has the kind of info that is difficult to find. Its currently available thru Amazon for less than $25.