D&D Motorsports Comp Hawk 331
D&D Motorsports can build a short-block in anything from a base 306 all the way up to a 347. Some of the company's more popular engine displacements include the 327, 331, 342, and of course the 347. D&D's line of Hawk Power short-blocks can handle up to 1,450 hp if you opt for the Pro Hawk that's built off the FRPP R302 casting and uses a billet crank and rods. But for most people, a $9,000, 1,450hp engine is out of their budget, which is why the Comp Hawk 331 stroker short-block is D&D's best seller.
Attractively priced at $2,295.95, the Comp Hawk 331 includes a new Ford 5.0 roller block stuffed with a CAT 5140 forged-steel crank, CAT 4340 forged-steel H-Beam connecting rods, JE/SRP forged pistons, and Childs & Albert moly rings and bearings. The complete short-block is balanced, blueprinted, comp assembled, and is capable of handling up to 650 hp.
Options on the Comp Hawk 331 include a 4340 forged steel crank ($125), a main support system with main studs ($99), JE custom pistons ($325), the FRPP Sportsman block ($895), or the FRPP R-302 ($1,795).
Scrape Your Own Knuckles
If you want to build up your Mustang with the proven performance of a stroker, but you still enjoy bolting your own goodies together, you can order a stroker kit and a bare block from many of the companies mentioned in this article. Some of the big-name catalog companies have options for you as well.
Holley Performance Products, known for decades as the leader in air and fuel distribution, has now come to market with its own stroker kit using the strength of its sister companies. Holley's new kit is a 350ci-based 302 and features a 3.425-inch stroked crankshaft and Lunati Street Race connecting rods that are 5.400 inches in length. The kit is available with several piston combinations for dished or domed application needs. It also features a Lunati oil pump and is externally balanced. This kit is designed for '86-and-up 302 roller block applications.
Performance Automotive Warehouse (PAW) sells three different
stroker block kits in 327, 342, and 355ci displacements. The kit includes either a new roller 5.0 block (327, 342) or a seasoned block (355) that is fully clearanced for the stroker kit and has the cam bearings and freeze plugs preinstalled. The stroker crank is a cast-steel piece with either a 3.25-, a 3.40-, or a 3.48-inch stroke depending upon the block kit ordered. Rods are new I-beam forged 5140 steel rods (5.400 inches long) with chrome-moly ARP rod bolts. You get Keith Black hypereutectic flat-tops, and the whole kit spins on tri-metal bearings. You also get a hydraulic-flat-tappet cam (an OE-style roller is an option) and a double-roller timing chain set. Everything comes prebalanced, and the pistons are even prefitted to the rods-simply bolt it together. The 327 and 342 kits are priced at $1,795, while the 355 kit will run you $2,895. Options include various items such as roller cams, forged pistons, H-beam rods, and more. Lastly, all three engines are available as long-block kits as well.
Another well-known catalog giant, Summit Racing, also has a 347 kit in its catalog. Though the kit does not include a block, Summit does offer production 5.0 roller blocks as well. Simply order the block separately, notch the cylinder walls for rod clearance yourself, and have your local machine shop bore the cylinders 0.030 inch over for the stroker kit. The Summit 347 kit includes a 3.400-inch-stroke, cast-steel crank; forged 4340 H-beam connecting rods; and Keith Black hypereutectic pistons. Sealed Power/Speed-Pro rings seal the KB pistons to the cylinder walls, and Clevite bearings keep everything spinning. Fel-Pro gaskets and a Melling oil pump are included as well for the sweet-deal price of $1,479.95. Throw in a Summit 5.0 block for another $329.95 and you're ready to begin wrenching.