5.0 Mustang & Super FordsHow To Engine
408W Stroker Windsor Build - Big-Inch Boss
Using Ford’s Boss 351 Block to produce big, dependable power
When Ford introduced the new Boss 302 and 351 blocks, they were meant to consolidate a wide-ranging lineup of race-oriented blocks with one do-it-all solution. But you better believe that right away we started planning how to use these new babies in high-horsepower street applications. Especially since stock 351 Windsors are getting harder to find in the wild and can be a bit expensive if you have to send them to the machine shop to bring them back to spec.
The idea behind this build is to put together a 500hp Windsor that will be right at home in just about any Mustang. But 500 hp these days is too easy, so we decided to up the ante just a bit. First, it has to be naturally aspirated-no problem. Second, since most of us are still pinching pennies with the continuing poor state of the economy, it has to be easy on the wallet. So we stayed away from the exotic stuff and stuck to off-the-shelf parts that offer great value, but we didn't use any recycled stock parts because we want this engine to be super durable. Which brings us to the third requirement: It has to be dependable. So if anything, this engine is overbuilt. You should be able to take it to the track and wail on it all day long with no worries. Or say you want to add a little nitrous later on- no problem. As they say, let her snort and have fun.
With those requirements, using a Boss 351 block as a foundation became a no-brainer. At just under two grand, the block provides about the best bang for the buck anywhere and hardly costs any more than a stock Windsor block that has been fully machined and blueprinted. But the Boss block still has some advantages over that, namely it's cast using diesel-grade iron, which exhibits a much greater tensile strength than the stock casting. Plus, there's extra meat in all the critical stress areas. And then there's the standard four-bolt, nodular-iron main caps.
When you put it all together, you get a block that shrugs off 500-plus-horsepower blasts and asks for more.
On The Dyno