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1970 Ford Mustang Boss 302 - Perfecting The Breed

Jon Hallenbeck's Pro Touring Boss

Photography by Anders Odeholm

CC: Did you have the One Lap event in mind when you planned the car?JH: Yes. I've run the One Lap five times and have had a great time doing it. Stielow's white Camaro participated back in the mid-'90s and came in Fourth overall the last time it ran. I think it's a challenge to build an older car that can actually compete with the types of vehicles that enter that competition. There's some heavy hardware there.

CC: So what's next for the Boss?JH: Well, it has only been truly "done" for a relatively short period. It was running and driving but not completely sorted. I'm not sure if I'll attempt the One Lap with it, since the rules really don't favor cars like this anymore. I will be driving the car on the street quite a bit, though, and I'm really looking forward to some open-track time.

The Details
Car: '70 Ford Mustang Boss 302
Owner: Jonathan J. Hallenbeck

Engine: Ford Racing 351W now displacing 454 ci

Heads: Ford Racing Yates aluminum; 2.10/1.60-inch valves, 67cc chambers

Induction: Motec programmable EFI, Ford Racing single-plane manifold

Camshaft: Comp Cams solid roller 0.608/0.614-inch lift and 242/248 degrees duration @ 0.050

Transmission: Tremec T56 six-speed manual

Rearend: Ford 9-inch by Currie, 3.89:1

Front suspension: Stock '70 Mustang modified w/Global West upper control arms and Total Control lowers, coilover shocks, B&D rack-and-pinion steering, altered geometry

Rear suspension: Stock-type leafspring

Brakes: Baer 14-inch front; Baer 12.5-inch rear

Wheels and tires: Fikse 18x9-inch, front; 18x11-inch rear; Michelin Pilot 245-40/18 front; 295-30/18 rear

Body mods: Stock wheel arches, fender lips trimmed and rolled; carbon-kevlar hood

Paint: '69 Shelby Gulfstream Aqua by Emery Pratt and Mike's Auto Body, Pittsfield, ME

Cost to build: "I'm glad I didn't know when I started."

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