My truck runs about 140 psi, but was rebilt recently. 120psi is normal for a truck with normal wear.
then youre running about 8.5:1 compression
around 80 ft.llbs. or higher is usually good.
head gaskets??? warped heads? did you have them milled?
150 LBS. per cylinder. If you hace more then 15 LBS. difference between any cylinders the engine will idle rough and not run good.
Compression ratio on a 1974 Chevy 350 in a Nova was 8.5:1.
The compression ratio of a 350 Chevy engine usually ranges from 8.0 and 9.0 to 1. This provides a good balance of fuel economy and power.
8.5 to 1 compression is factory stock.
the firing order for a small block Chevy 350 is 18436572
To determine the compression stroke on a 350 Chevy engine, first, remove the spark plug from the cylinder you want to check. Then use a compression gauge and crank the engine over by hand or using a starter until you see the gauge reading stop climbing. This indicates the compression stroke where the air-fuel mixture is being compressed in the cylinder.
10.5-1
About 8.5 to 1