Here is a site that provides the sequence: http://www.autozone.com/az/cds/en_us/0900823d/80/11/bc/70/0900823d8011bc70/repairInfoPages.htm#hd1-1-1 Just arrow down and it will show you the sequence for 6 cyl, SBC and BBC.
Start in the middle, and work your way out, in a circular pattern. First, go half torque, then full, turning the crankshaft by hand after each cap.
torque specs 350 Chevy heads65 lbs
35ft. lbs.
45 lbs.
The torque specification for a small block Chevy 305 oil pump typically ranges from 10 to 15 ft-lbs (13 to 20 Nm). It's important to follow the manufacturer's recommendations for specific torque values and to use a calibrated torque wrench for accuracy. Always ensure that the oil pump mounting surface is clean and free of debris to achieve a proper seal.
45 Lb/ft Below is a link to all small block Chevy torque specs.
65 ft-lbs
65ft. LBS.
35 ft. lbs.
35 ft. lbs.
You can get the sequence out of any repair manual such as Motor's, Chiltons, or Haynes. The idea is to start in the center and go in a clockwise pattern working your way out to the ends. Usually three stages is adequate, such as 30 ft/lbs, 45 ft/lbs, then final torque on the third pass.
The 400 Chevy small block motor should have approximately 390 horse power. It should have 427 foot pounds of torque.