You’ve got questions. We’ve got answers — Mondays, when the Summit Racing tech department tackles your automotive-related conundrums. This week in our Monday Mailbag we’re helping a reader take his ’70 Mustang into the 9-second range on the quarter-mile.
Q: I have purchased a 1970 Mustang. I have a 1969 460 engine that I’m told will fit in the engine compartment. I want to build a car that will do 9-second quarter-miles.
The engine will be bored .060 inches over, have a stroker kit, Cobra Jet heads, and an Edelbrock Victor Jr. intake. I need advice on carburetion and headers. The transmission will be a Powerglide with a trans-brake or a C-6. I plan on using a 9-inch Ford rear-end and ladder bars. Any help you can give me before I buy parts would be appreciated.
A: We can give you some general guidelines to help you build your 9-second Mustang. Keep in mind it won’t be cheap, nor will it be cheap to run.
- Compression: 12.5-13.0:1
- Camshaft: roller with 4,500-7,800 rpm powerband
- Intake/carburetor: Edelbrock Victor 460 intake with 1,150 cfm Holley Dominator
- Ignition: MSD box, distributor, Blaster 2 coil
Transmission choice will be somewhat dependent on vehicle weight. We suggest you put your Mustang on a serious diet to get it under 3,000 pounds. At that weight, we’d use a Powerglide and a 5,500 rpm stall torque converter. You might want to consider using an air shifter, too.
A Ford 9-inch is a must. You will need a spool and aftermarket axles to handle all the power you will be putting into the rear.