I think Flow bench testing is very important to start your build. Porting heads helps increase air flow into the engine and those new ported heads need to be checked. Then checking the Cold Air Intake ( CIA) for air flow and the exhuast headers and exhaust pipe for the best air flow.
Then an engine dyno to start your tuning. Finnally a chassy dyno to determan your useable power and the drive line loss.
Most drivelines tend to loss 10-15% from the engine, flywheel or BHP to the usable drive wheel power. Front or rear.
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