Street Stage II GN for sale


Sep 4, 2002
Price - $18,000


274 CI Stage II Buick
Originally a Nascar crate engine, modified for low compression and wet sump oiling.
JE pistons 7.8 to 1 compression ratio
Carillo connecting rods
Precision Hyd roller cam .528 lift .220 duration
Champion Aluminum GN1 Cyl Heads
Bowling Green Mega Flow Alum Intake (ported to match cyl heads)
70 MM ATR Throttle body
72 lb. Siemens low impedance injectors
Razor Variable ratio Methanol Injection System
PT 70 Turbo w/ATR external wastegate (Flows 1,220 CFM) (adjuster in glove box)
Wide Band O2 System
FAST (Felpro) Management System
T&D 1.65:1 Ratio Roller Rocker Arms
ATR Adjustable Fuel Pressure Regulator
Red Armstrong twin 255 lb/hr in-tank fuel pumps
RJC IC-325 Megacooler Frt. Mt. Intercooler w/3” aluminum pipes

Level 3 200R4 Overdrive Trans.
9” Multi-disc Precision Vigilante 3,500 rpm stall Converter (locks up w/dimmer switch on floor)
ALTO Redline racing frictions
TransGo Competition reprogramming shift kit
GreatStar full race internals
300M Indestructible input shaft
Hardened heat treated stator shaft
Expanded Capacity bearing package
High Capacity Super Duty center support and drum assembly
High Performance Billet Super Servo
13 Vane high-output Pump
High Load springs
.500 Boost Valves
ALTO Redline Band
Extreme Duty springs for Sprag
Expanded capacity power pack direct Clutch Drum
Power Pack Overdrive 4th clutch
Power Pack Expanded capacity forward Clutch Drum

Rebuilt Posi w/all new bearings and clutches (3.42:1 ratio)
Moser 31 spline Axles
Metco Adjustable upper control arms
Hotchkis lower reinforced control arms
C-Clip Eliminators (not installed)
ATR Heavy Duty rear anti-sway bar
Driveshaft loop

3" test-pipe into dual 2.5" dual tailpipes
3” Terry Houston Down Pipe

Rear Disc brakes from Camaro (not installed)
New Hydroboost Master cylinder

5-digit odometer says 60,xxx miles (rollover?)
Paint is old (wear, fade, cracks, chips) The car was repainted once, long ago.
T-top car
Interior is original and all there, minus GN floor mats. Steering wheel has wear at top of leather wrap. Headliner is sagging in rear. Dash cover cracked at both sides over speakers.
Recently replaced door and t-top seals. Getting some wind noise from T Tops now.
Concert sound radio (not working)
Power windows, cold A/C, (door locks & cruise has stopped working)

Front: BFGoodrich Comp T/A 235-60-15
Rear: Nitto Extreme Drag Radial 275-50-15


Various documentation, receipts, manuals, etc for engine and other modifications. Engine blueprinting sheets.
Brochures, papers, videos, for 86-87 GN's
Boxes of extra parts, some stock, some used, some new, some aftermarket, including intercooler, chips, injectors, interior pieces, alternator, intake, plumbing, new cam sensor, head studs, and more

ALSO: If buyer wants, I will include the original Stage II cylinder heads, Buick 6 valve covers, intake, pistons, round-track oil pan, camshafts, etc that came off this engine. Also, two extra never-used low-compression pistons identical to what is now in the engine.

Beautiful car with even better power combo , any track times or dyno numbers.. Good luck selling.
Am willing to consider a 4x4 pickup 2000 or later as partial trade in + cash. Trying to make it easy for someone out there.