With the engine at #1 TDC you can set 1, 2, 5, & 7 intakes, and 1, 3, 4, & 8 exhausts. Rotate the engine one revolution (#6 TDC) to set the rest.
When you're adjusting the backlash, tighten the nut on the rocker until there is no up and down movement of the pushrod. When you get to the point of zero backlash, tighten an additional 1/2 turn for preload.
Rocker studs lubricated with oil, 50 ft/lbs. Valve covers 3 lb/ft.
You can, but it will kill the performance of your engine.
YES they are the same.
17 ft.lbs.
Per Champion spark plug applications chart, the gap for 1989 Chevy 305 (5.0L) is .035.
18436572
To adjust the rocker arms on a 1977 Chevy 305 engine, first, ensure the engine is at TDC (top dead center) on the compression stroke for the cylinder you are adjusting. Loosen the rocker arm nut until it can be turned freely, then slowly tighten it while rotating the pushrod until you feel a slight resistance. Continue tightening the nut an additional half to three-quarters of a turn to secure the adjustment. Repeat this process for each cylinder, following the proper firing order.
1,3,5,7,2,4,6,8,
very carefully
YES they are the same.
All 305 and 350 Chevrolet V8 motors are 18436572
if it is a 5.0 its a 305 if 5.7 its a 350