>"...There is a very simple formula you can apply to estimate service life: simply multiply the cubic inch displacement of the engine times one. The result is the maximum amount of horse power you can have and still expect a reasonable service life. This formula would seem to break down when it comes to the Ford Lehman 120. This engine is 380 cubic inches, but I suspect if you tried to get 380 horsepower out of it the service life would be measured in seconds. ______________________________ C. Marin Faure GB36-403 "La Perouse" Bellingham, Washington