Vintage Ford publications available on MustangTek.com. Their extensive library features 1960-70s Ford small and big block casting numbers along with pictures to identify engine and transmission parts.
A collection of information from a variety of sources, along with nicely presented diagrams and graphics.
Performance Trends Inc. has developed several very useful calculators for engine builders — Drag Race Dyno, Port Flow Efficiency Calculator, Bore Calculator, Stroke Calculator, Supercharger Boost Calculator, Engine Displacement Calculator, Engine Inertia Dyno Sizer and Chassis Inertia Dyno Sizer — all are available on their website.
An informative video from Performance Trends Inc. about the more advanced features of their Compression Ratio Calculator. This inexpensive, yet powerful tool has become very popular with professional engine builders.