could be a bad head gasket or cracked head.
small block
a 400 small block Chevy has a 4.125" bore.
the firing order for a small block Chevy 350 is 18436572
4.125"
The deck is the surface to which you bolt the cylinder heads to.
A cylinder is misfiring.
If it is a V8 it is 65FT.- LBS.
65 FT. LBS.
65 ft lbs
160 foot lbs
The firing order is 1,8,4,3,6,5,7,2 with 1,3,5,7 on the left bank and 2,4,6,8 on the right bank. The distributor turns clockwise.
torque specs 350 Chevy heads65 lbs