I have done an engine swap to my car if u had not notice it actually has a 202 in there with 175CD strombergs but this is what i used to have in there and dont worry I still Have the old engine sitting in my Garage at home... I just needed more power.

Specifications LC GTR XU1
make: Holden
Year: 1970
Price when new: $3148
Weight:2300 lbs (1048kg)
Cylinders: six inline
Bore and stroke: 3.625 inch x 3.00 inch (92.0mm x 76.2mm)
Cubic capicity: 186 c.i.d (3048cc).
Compression ratio: 10.0:1
Valves: Overhead
Camshaft: single
Carburation: 3 x 150CDS (1.5inch) (38.1mm) Zenith sidedraughts
Fuel pump: Mechanical
Power at RPM: 160 Brake Horsepower (119.3kW) at 5200RPM
Torque at RPM: 190 lb/ft (258 Nm) at 3600RPM
Transmission type: Four speed Manual all synchro
Ratios:
1st: 3.428:1
2nd: 2.156:1
3rd: 1.366:1
4th: 1.00:1
Reverse: 3.317:1
Final drive ratio: 3.36:1 L.S.D
Construction type: Unitary
Front Suspension: Independant short and long arm type, coil springs, shock absorbers and anti roll bar
Rear Suspension: Four link type, coil springs and shock absorbers
Steering type: Rack and Pinion
Lock to Lock: 3.5 turns
Fuel Tank Capacity: 17 gallons imp (77.28lt)
Front Brakes: 10 inch (254 mm ) diameter discs power assisted
Rear Brakes: 9 inch (228.6 mm) diameter drums power assisted with tandem booster
Maximum engine speed: 6400RPM
Maximum speed: 125MPH (201 KPH)
in gear speeds:
1st: 36 MPH (58 KMH)
2nd: 58 MPH (93 KPH)
3rd: 93 MPH (149.6 KPH)
4th: 125 MPH (210 KPH) at 6000 RPM
Wheels and Tyres: 13 inch (330.2 mm) x 5.5 inch (139.7 mm) JJ steel rims with B70H x 13 inch 4-ply tyres
Standing Quarter mile elasped time --16.1 secs average
ENGINE BLOCK RECOGNITION -- (Eng. No. followed by) X

The Giant Killer GTR XU1 was the work of Harry Firth and the Holden engineers with parts availability and price in mind. The cost to do a home grown six cylinder with after market and factory bits was going to be about half the cost of the going the American V8 way. What they achieved was an amazing little car that is the most successful race and rally car ever to be built in Australia! In 186 cid form and with it's triple stromberg 150CD carbs and the twin branch headers it had a claimed output of 160 bhp. The Aussie 4 speed (M21) which was special in it's design replaced the weaker Opel units, they were also given heavy duty radiators. After proving that it was a competitive race car the 186ci was replaced by the 202ci and the carbs were increased in size to the 175CD's along with the valves, ported head with combustion chamber modifacations, revised camshaft, roller rockers, lighter flywheel (approx 20 pounds) and larger exhaust system. That was where the XU1 was going to end for the XU2 V8 was well under way until it was terminated which forced Harry Firths team to produce the ultimate six cylinder Holden race car, these cars at Bathurst were putting out in excess of 240 bhp (twin throat webber carbs). Just 150 Bathurst Specials with random engine numbers from JP 386598 to JP 404176, the public were never told of these but were given to dealers to pass them on to the right type of person. The unmistakable signs of an original 1973 Bathurst Model are, extra stiffening down the centre tunnel and braces under the front guards that was intended for the V8 version, the XU-2.

Page 2 History Of the Torana
Page 3 More pics
Page 4 Specs
Page 5 More on LC Torana
Page 6 Interior
Page 7 What wins on Sunday sells on Monday
Page 8 Tune up Specifications
Page 9 More on LC toranas
Page 10 Heaps and Heaps of Torana pics