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You can, but it will kill the performance of your engine.
Rocker studs lubricated with oil, 50 ft/lbs. Valve covers 3 lb/ft.
With the valve fully closed and the lifter fully at the down position, tighten the adjusting nut until there is no up and down travel in the push rod. Then tighten the adjusting nut 1/4 turn. This is only if you have hydraulic lifters. Tighten the rocker studs to 50 ft/lb of torque. These are the bolts holding the rocker assembly in place.
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.
17 ft.lbs.
1.5:1
No. Just a standard 305 with a 2 barrel carburetor.
.060"
around 18 with 305 engine
From #1 TDC, you can adjust 1, 2, 5, & 7 intakes, and 1, 3, 4, & 8 exhausts. Rotate the engine one revolution for #6 TDC, and do the rest. Loosen each rocker nut until there is backlash in the pushrod, then tighten to zero backlash plus 1/2 turn of preload.
first disconnect primary lead from distributor so it won't spark,then remove valve covers. then while turning the engine over with remote starter switch or with someone turning the key for you,watch the rocker arms to see if one is not moving like the rest.if rocker arm or push rod is broken they can be replaced from up top,but if a lobe is worn off of the camshaft(a very common problem with 305 cams for a few years)that is a bit more involved.
1977 305 doesn't have points unless the distributor has been replaced with an older design. Point gap on any V8 Chevrolet is 30 degrees dwell.