Anything above 125 LBS. is fine as long as there is no more then 15 LBS difference in any of the cylinders.
Good compression, good heads, good cam.
Not a good idea. 350 heads will lower compression to 7 to 1 or less.
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.
Has no compression needs new rings
Compression ratio on a 1974 Chevy 350 in a Nova was 8.5:1.
around 80 ft.llbs. or higher is usually good.
Usually at least 140-150 lbs.
8.5 to 1 compression is factory stock.
1993 350 what? check auto.consumerguides.com
Remove a spark plug and crank the engine over by hand until you feel compression coming out of the spark plug hole. That is the compression stroke. Most 350's run pretty good with timing set between 8 and 12 degrees BTDC.
A 260 what, on a 350 what, might help us answer that.
The 3970010 number on a 350 was found on the back of your block. Its a base number for that cubic inch motor. Its been there on multiple years of 350. It is also used for all kinds of applications from light cars to heavy duty trucks. all with different compression. There is no way to get compression ratios with that number. Use the number on the front of the block by the head. It will give you year, make and model of the car it was put in and you can track down your compression numbers from there. What you want to see is the compression reading of all the cylinders be within 15 psi of each other.