Fully ported Three-Valve heads...
Fully ported Three-Valve heads were prescribed for this combination. Groh informed us that the heads flow 322 cfm on the intake, at 0.500-inch lift.
The '05 Mustang GT that received this monster mod motor is no slouch. It's equipped with an eight-point roll bar and all the legal items to hit the track. The suspension fore and aft is prepared with aftermarket control arms, K-member, and anti-sway bar. Our test Stang also rolls on Bogart "big and little" slicks and skinnies. The giant stroker is backed by a TCI TH400 transmission with a healthy 4,700-rpm stall speed torque converter. The rearend is fortified with a Detroit Locker differential, FRPP 4.10 gears, and Strange 33-spline axles. On the Dyno Dynamics chassis dyno, the '05 ripped 849 rwhp and 720 rwtq, sans nitrous. Unfortunately, we don't have any track times on this combo but Burcham says the car will run deep into the 9s with just the F1R huffing boost into the engine.
If your mod Stang is lacking cubes, then it's time to start boring and stroking your way to 322ci. The Boss is certainly back!
 The exhaust port flow 215...  The exhaust port flow 215 cfm at 0.575-inch lift, the same lift as the Comp custom camshafts. |  JPC billet IMRC delete plates...  JPC billet IMRC delete plates were used for this engine. |  Here is a production JPC Racing...  Here is a production JPC Racing intake manifold. It is designed for a wide variety of applications, including the 322 stroker Groh builds. |
 This particular engine was...  This particular engine was restricted to 7,000 rpm with the stock intake. The JPC cast piece would have allowed it to run up to 8,000 rpm with ease. |  Paschal Performance provided...  Paschal Performance provided its VCT lockout gears. Removing VCT is required with aggressive cams and big valve springs. |  The cam gears allow the cam...  The cam gears allow the cam timing to be adjusted and locked down. |
 A Canton oil pan holds the...  A Canton oil pan holds the synthetic oil and helps keep the engine lubricated. |  Here is the engine completed...  Here is the engine completed and in the car. The centrifugal blower is a ProCharger F1R with an air-to-air intercooler. The engine spun the chassis dyno to 849 rwhp and 720 rwtq. |  The 322ci engine is completed...  The 322ci engine is completed and ready to be shipped to JPC Racing. Unfortunately, the intake manifold wasn't part of the package and the owner decided to go with the stock intake. |