Cylinder #1 is front on drivers side. Drivers side is 1-3-5-7 Pass side is 2-4-6-8.
Cylinder 1 is the first/front cylinder on the right side of the engine looking from the front of the car. That bank is 1-3-5-7 and the left bank is 2-4-6-8.
Driver side front cylinder.
Front cylinder on the drivers side.
The correct distributor firing sequence for a 1971 Pontiac GTO with a 455 engine is 1-8-4-3-6-5-7-2. The number one cylinder is located at the front of the engine on the driver's side. When setting the timing, ensure that the rotor is pointed towards the number one terminal on the distributor cap when the engine is at top dead center (TDC) on the compression stroke for that cylinder.
#1 cylinder is on the front right side of the engine.
#1 should be the front plug on the driver side of the engine Driver side front to rear...1,3,5,7 Passenger side front to rear 2,4,6,8
firewall 8 - 7 6 - 5 4 - 3 2 - 1 front
Driver side front cylinder. DS 1357...........PS 2468
# 1 position on the distributor cap of a 455 Pontiac faces to the rear , and towards the drivers side ( according to my Chiltons repair manual from the 1970's )
The cylinder compression for a 1972 Pontiac 455 engine typically ranges from 8.0:1 to 8.5:1, depending on the specific model and configuration. This compression ratio is designed to accommodate the fuel quality available during that era while providing a good balance of power and efficiency. It's important to check the specific engine's specifications, as variations may occur based on factory options and modifications.
Its the Cylinder on the driver's side, closest to the front bumper
Yes engine was changed very little over it's life. One thing to watch out for, the 1970 cylinder heads will raise your compression to 10-10.5:1 which is too high to run on today's pump gas. The casting number 64 heads were the best 455 heads in 1970, they have 2.11 intake/1.77 exhaust valves and 85-87 cc chambers. They will give you about 10.5:1 compression, if you have acess to 95+ octane fuel they will boost power and milage over the anemic 7.6:1 compression of the 1975 455 Pontiac.