This is my first truck.  It's a 1989 GMC Z71.  It originally had a 5.7 (350) TBI with a heavy-duty manual 4 speed transmission.  Since then, I have replaced six engines, two rear end housings and five or six pinion and gear sets.

Here is a list of the modifications on my truck.

Engine specification:
 

Displacement 502CID/8.2 liter
Bore & Stroke 4.47" x 4.00"
Engine Block Iron
Compression Ratio 9.6:1
Horsepower 502 @ 5200 rpm
Torque (lb-ft) 567 @ 4200 rpm
Maximum Recommended RPM 5800
Crankshaft Forged Steel
Pistons Forged Aluminum
Connecting Rods Forged Steel
Camshaft, hydraulic High lift with steel rollers
Heads Cast aluminum with oval port
Valve diameter Intake = 2.25" / Exhaust = 1.88"
Valve lift Intake = .527" / Exhaust = .544"
Rocker arms Crane 1.7:1 roller rockers

 

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