What a great playground the middleblock world has become. Just imagine being able to stuff as much as 429ci into your 351W-based block. This gives you big-inch power in a lightweight small block. How far should you go with your 351W? Displacement depends on the amount of power desired and how you’re going to get there. You can pump biginch displacement into a mild-mannered 351W if your main objective is torque. For example, you might be building a big-inch small block displacing 427ci for your F-150 truck. We’re not talking a high-revving screamer here, but a solid, dependable, big-twist powerhouse designed to pull heavy loads like a trailer. This is where the long arm of torque comes into play. A lightweight 427ci middle block will make as much power as an FE-series 428ci big-block without the weight penalty. We do this by expanding the stroke out to 4.170-inches and using a 4.030-inch bore. That’s less iron, with the 428’s bore and stroke dimensions.
This Tech Tip is From the Full Book, HOW TO BUILD BIG-INCH FORD SMALL BLOCKS. For a comprehensive guide on this entire subject you can visit this link:
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Hauling may be the last thing on your mind. Maybe you’re building a biginch middle block for your ‘68 Mustang fastback where handling is desired, and you wants the intense, persistent power of a big block. The beauty of the 351Wbased mill is the weight advantage for your Mustang. Mustang’s fitted with FEseries or 385-series big blocks suffer from poor weight distribution (they’re nose heavy). With the stroked 351W small block, the Mustang gains aggressive displacement without putting on weight.
In the Mustang, your 427ci stroker can be a mild-mannered mill for weekend cruising, or a screamer with a nasty attitude for the drag strip. That’s the beauty of a stroker. It can be anything you want it to be without the weight penalty.
Building The CHP/TA Racing 408
Most of us who live in Southern California know Mark Jeffrey of Trans Am Racing out of Gardena, 15 miles south of downtown Los Angeles. Mark’s business is about Fords, mostly. He does business in the company of a lot of familiar names in the Ford realm, including Carroll Shelby. Last we looked in on Mark, he was building a 408ci stroker for Mustang Monthly magazine. Luckily, we were allowed photograph the buildup alongside the magazine staffers.
Mark was building a 408 Street Fighter package from Coast High Performance. This 408 stroker is more a budget project with a nodular iron custom crankshaft, I-beam rods, forged pistons, Edelbrock Performer RPM heads and induction, and a 1980s-vintage 351W block fitted with a Comp Cams roller hydraulic camshaft. We’re building a budget 351W stroker because its mission will be towing and hauling in a Ford E-150 van. Low and mid-range pulling torque is the goal here.
Written by George Reid and Posted with Permission of CarTechBooks