After getting our Windsor baseline, we installed the Cleveland heads on our 347 short-block.

We spun up the Clevor hybrid on the engine dyno to see if Cleveland heads still reign supreme.

Cleveland heads have always had an advantage over Windsor heads from the factory.

We find out, does that still hold true with today's aftermarket?

Expanding their small-block Ford supercharger kit lineup, Harrop Engineering now has a kit for the 9.5-deck Windsor engines.

The TVS 2650 supercharger combined with the tall-deck Windsor engine is impressive.

Back in the day, the Clevor engine was the hot ticket for OEM Blue-Oval performance.

This build proves it's still wirthwhile today, especially with aftermarket components.

When it comes to building an engine for a GT40 replica, an all-aluminum 427 inch Windsor fits the bill nicely.

The naturally aspirated small-block gets it done in a featherweight package.

Harrop Engineering has developed a modern Roots TVS supercharger kit for the classic small-block Ford engine lineup.

Initial testing has shown some incredible 1,000-horsepower results.

Before we can start testing all the new, modern parts on Retro 5.0, we need to get a baseline.

However, even the baseline was a significant improvement over the '90s.