Diff ratio help

ENGINE DETAILS - TO GO WITH TREMEC MAGNUM - TYRES
BBP 448 CRATE ENGINE
Block Prep:
Casting inspection
Sonic Check cylinder walls
Deburr interior surfaces
Chamfer and Radius edges
Deck Head Surface
Cylinder Bore and Hone with Plates
Line Bore and Hone with Plates
Shot Peen Main Caps
Total Block Cleansing
Short Block Assembly:
Mopar Block
Molnar Technologies 4340 Forged Crankshaft
Molnar Technologies Forged H-Beam Rods
Diamond Racing 2618 Pistons
ARP Main Studs
ARP Head Studs
Clevite H-Series Bearings
Head Assembly:
Mopar Apache 6.4L Head Castings
Stainless Steel Valves
Conical Beehive Valve Spring .650" lift
Hardened Locators and Retainers w/ Shims
Viton Valve Seals
Multi Point Cut Valve Job
Camshaft Kit and Timing:
Custom Grind VVT Camshaft
Phaser Lockout
Chromoly Pushrods
Non_MDS HD Lifter Set
Mopar Rockers
Mopar Timing Set
Melling Oil Pump
Specifications:
Cubic Inches: 448
Liters: 7.2
Bore Size: 4.095"
Rod Length: 6.125"
Stroke: 4.250"
CVF Black Billet Front Accessory Drive
Holley Terminator Max GEN 3 Hemi PCM and Wiring