Mark Houlahan
Tech Editor, Mustang Monthly
May 1, 2002
Photos By: 5.0 Mustang & Super Fords Archives, Courtesy of Manufacturers

Ford Racing Performance Parts 347 (M-6009-B347)
FRPP began offering this 347 in its '01 catalog as a great way to get 347 cubes of power right from Ford without having to assemble anything. Previously, you had to buy the crank and rods or stroker kit from the FRPP catalog and assemble the kit yourself. Now Ford handles all the block machining, balancing, and assembly for you.

The FRPP 347 features a new production two-bolt 5.0 block, a 3.40-inch nodular cast-iron stroker crank, 4.030-inch hypereutectic pistons with chrome rings (valve reliefs for inline valve heads), SAE 4130 forged-steel connecting rods (M-6200-D50), Federal-Mogul bearings, and 28-ounce external balancing. While the photo shows a cam and timing chain installed, the FRPP 347 will require a cam and timing chain (as well as heads and valvetrain) to be completed. FRPP's retail pricing on this factory gem is $2,495 retail.

Fox Lake Power Products 331/347
Ron Robart opened the doors at Fox Lake Power Products in 1993. Primarily concentrating on CNC-ported cylinder heads and intakes and custom cams, the Fox Lake name was quickly associated with some of the fastest cars in Ford drag racing. Soon the company was building engines for customers to match their CNC top-end offerings, though the machine and assembly work was done out of house, leading to occasional problems.

In late 1999, after a recent expansion of the shop, Ron and his staff brought the engine machining and assembly in-house so they could control the quality. Now Fox Lake handles the complete block machining and assembly from start to shipping with its Sunnen engine-machining equipment. Having the work done in-house also allows the company to work on custom machining orders that might have taken too long for a customer who didn't want to wait.

When we asked Ron to provide us with information on the company's stroker short-blocks and which is its best seller, he stated, "The 331 and the 347 sell about the same." Though some vendors told us there was a clear sales winner when interviewed for this article, Fox Lake's sales are about dead even on its two small-block offerings. Since basically the only difference between the two is the stroke length of the crank, and all other parts being equal, we included both engines in the listing here.

Fox Lake's 331/347 strokers start off with a seasoned block that is fully machined on its in-house equipment. Into this block goes an Eagle cast-steel crank, Eagle forged-steel I-beam rods, and SRP forged pistons (for inline valve heads). The entire assembly is then balanced to 28 ounces.

Options at Fox Lake include Twisted Wedge pistons ($100) and the option to build with either an FRPP B50 or R302 block as the base of the short-block assembly. Final pricing depends on options, so give Ron a call to discuss the details and to get an accurate price for your short-block needs.