FEATURE
Jeff Mumford’s 1970 Camaro is the Ultimate Street Machine
Images by The Authors car people, we tend to romanticize time periods because of certain positive aspects that stand above the negative ones. The 1970s is perhaps the most vivid example of this phenomenon, because even if you didn’t live through the decade, you know there was a mixture of good, bad, and just plain ugly. For Jeff Mumford, a longtime car guy from Taylorsville, Kentucky, he wanted to hand pick the goodness from the ’70s street machine days and apply those elements to his 1970 Camaro Rally Sport. The result is a car that he calls “Snot Rocket,” a period-correct street machine that has all the right elements without the gaudy details that often accompany these radical creations.
The ’70s build style presented a few challenges, as the Camaro was a blank canvas and there were many directions it could go. Jeff wanted it to be simple and clean, but undeniably ’70s, so he let the car’s stance and engine combination do most of the talking. He didn’t want wild paint or outlandish interior—he just wanted a tasteful car that looks like it belonged in that era.
Horsepower is another ingredient in the street machine recipe, and Jeff’s right foot is responsible for managing more than 600 hp by way of a big-block Chevy, which comes in at 460 ci. The 0.030-inch overbore is filled with Ross forged pistons, giving the rowdy big-block a streetable 10.5:1 compression ratio. John Triplett built the engine using an Isky hydraulic roller camshaft and buttoned it up with a tried-and-true tunnel ram to complete the ’70s street machine package. Jeff upgraded his carburetor setup with a pair of ATM Innovation XRC carburetors, built and tuned by Doug Cross at ATM. Aesthetically, the engine looks the part, as it wears Chevrolet Orange paint, nicely detailed Mickey Thompson tall valve covers, and filtered velocity stacks that feature a custom-mixed paint to replicate the classic gold anodized finish.
When it came time for bodywork and paint, Thompson Hot Rods straightened up the rust-free sheetmetal and added an L88-style hood, which is relieved and flanged to make room for the carburetors and velocity stacks. Otherwise, the body is stock. Thompson Hot Rods laid down the PPG Deltron materials, mixed in Code 43 Citrus Green. Inside, you’ll find a stock white interior, which features PUI interior components installed by Jason’s Upholstery in Louisville, Kentucky. The Lakewood-style three-point rollbar was built by John Triplett and painted satin gold by Jeremy Thompson. The only other interior modifications are the aftermarket radio, Vintage Air control panel, and the Deist Safety harnesses.
Thanks to Jeremy’s vision and the hard work of great friends, this car hits the high points of the ’70s without the gaudy side effects of the era. Tasteful, slick, and fast were on the agenda and that’s exactly what you get with Jeff Mumford’s nostalgic second-generation Camaro.

Vehicle: 1970 Camaro
Type: Big-block
Displacement: 460 ci
Compression Ratio: 10.5:1
Bore: 4.280 inches
Stroke: 4.000 inches
Rotating Assembly: Stock crank, Ross pistons
Cylinder Heads: Rectangular port GM castings
Valvetrain: 2.205/1.610 valves, Brian Tooley Racing valvesprings
Camshaft: Isky hydraulic roller, 0.602-inch lift
Ignition: MSD Pro Billet distributor, 6AL box
Intake: Edelbrock street tunnel ram
Carburetors: Dual ATM Innovation XRC Race Series 750 cfm
Assembly: John Triplett
Exhaust: Hooker long-tube headers, 3-inch pipes, Flowmaster mufflers
Ancillaries: Mickey Thompson valve covers, modified velocity stacks
Output: 627 hp, 625 lb-ft of torque
Transmission: GM 4L60E Level V by RPM Transmissions, 3,200-rpm converter
Rear Axle: GM 12-bolt, 4.11:1 gears, Eaton differential, Moser 35-spline axles
Front Suspension: Moroso trick springs, Lakewood 90/10 shocks
Rear Suspension: Calvert Racing leaf springs, 50/50 shocks, Lakewood traction bars
Brakes: Original disc front brakes, 11-inch rear drums
Master Cylinder: Stock reproduction
Wheels: E.T. Classic V, 15×4 and 15×10
Tires: Moroso 7.10-15 front, Pro Trac N50-15 rear
Seats: Stock
Steering: Chevy comfort grip steering wheel
Console: Stock
Shifter: Stock
Dash: Stock
Instrumentation: Stock
HVAC: Vintage Air
Audio: Stock look reproduction
Paint: PPG Deltron Citrus Green by Thompson Hot Rods
Hood: L88-style hood
Grille: Stock
Bumpers: Stock
Lights: Stock