Here is the baseline on the Mallet 435.
The engine only has 3,500 miles on it and the weather was cold, and had rained.






ENGINE
372 Cubic Inches (6.1 Liters)
Billet Steel 4340 Chromoly Crankshaft, Nitride Treated, Knife-Edge Aero Counter-Weights
Billet Steel 4340 Forged Chromoly H-Beam Connecting Rods
Forged Aluminum Lightweight Pistons w/ Swain Ceramic Anti-Friction and Heat-Barrier Coating
Custom Mallett-Spec. Billet Performance Roller Cam (gun-drilled)
Custom 4340 Chromoly Steel Pushrods
Custom High-Speed Valve Springs & Lightweight Retainers
Heads Custom High-Flow Ported/Polished
Carbon-Fiber Coil/Rocker Covers
High-Performance Exhaust System
3.73 Rear end gear
Tubbed
335/30 18" rears
275/35 18: fronts
Penski adjustable shocks
Lowered 2 inches

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Team ZR-1
Teamzr1.com

I'm still amazed that you got such high hp from the Z because so many I hear dyno right around a stock Z06 ~325-335. You definitely had a strong running Z!

George