I need torque settings for Chev. 4.3 6 cyl for Rods, Mains, Headbolts, Cylinder Head, and Cam shaft timeing

renew all bolts for cyl.head mains and big ends
cyl head stage1 35nm stage2 60nm stage3 +90degrees
mains stage1 65nm stage2 +90degrees
big end stage1 30nm stage2 +90degrees

Cylinder head bolt are 60 nm then a 90 Degree turn, Main bearing bolts are 30 nm then 180 degree turn and connecting rods are 30 nm then 90 degree turn.

depends on your engine. If it's a VW air cooled flat 4, the mains which also ties down the engine casings, is torqued to 35 ft lbs and the cyl heads to15 ft lbs.
On more modern engines the mains can be torqued to 65 ft lbs, the big ends to 45 ft lbs and the cyl head to anywhere between 30 to 45 ft lbs.
A common remark among mechanics is to turn them till they strip, then a quarter turn back. Don't follow this rule.

Thread Head bolt torque and sequence
Read the threads, but it states:
According to my manual the removal and the replacement sequence are different. Removal (looking from the cam sprockets )
headbolt 1-3-9-5-7 are on the left and 2-4-10-9-8 are on the right. Remove in that progression.
Instillation 9-5-1-3-7 are on the left and 10-6-2-4-8 are on the right tighten in that order.
Tighten to 25Nm or 18 ft/lb. and retighten the cyl hd blt 70 deg plus 70 deg plus 50 deg using the angular torque guage KM-470-B.
Hope this helps. Might help to make a sketch and label the 5 headbolts on each side.

My manual shows an 8RC for 70 and 71 and an 18RC for the 72-74

18RC valve clearance HOT IN .008 EX .014 cold spec. .007 .013
Cyl head 72-82 Ft Lbs
Rocker caps 12-17 ft lbs
cam bearing clearance .001-.002
cam endplay .0017-.0066
oil tube 11-16 Ft Lbs

Follow these steps to adjust to the recommended torque:
1. cylinder head-30-35 nm + 30-35 + 65deg + 65deg.
2. mains-30nm +65deg
3. big ends- 1 - 26nm 2 - 52NM
4. fly-wheel -130nm
5. cam-sprocket - 100-120
6. crank-pulley - 170-180
7. cam caps -15nm

The connecting rod bearing cap nut on a four cylinder is 40 ft-lbs. The cylinder head bolts are torqued in four steps.1-45 ft-lbs 2-65 ft-lbs 3-65 ft-lbs 4 1/4 additional turn after reaching torque specification. On the V-6 & V-8 the connecting rod cap nuts at 45 ft-lbs and the headbolts are torqued in two steps 1-50 ft-lbs and 2-105 ft-lbs. Hope this will help you.

dear friend:here follows the settings in need:
cylinder head-30-35 nm + 30-35 + 65deg + 65deg.
mains-30nm +65deg
big ends- 1 - 26nm 2 - 52NM
fly-wheel -130nm
cam-sprocket - 100-120
crank-pulley - 170-180
cam caps -15nm

There should be 10 headbolts. This vehicle uses torque to yield headbolts and should be replaced with the new gasket. Bolts 1-8 get torqued to 40 ft lbs initially, bolts 9 and 10 get torqued to 30 ft lbs initially, Then all bolts get turned an additional 90 degrees. I would strongly suggest borrowing a torque angle gauge for doing this or you might be doing the same repair next week.