Vacuum on 1968 GTS 340 4 spd.

Same stock Non adjustable hydraulic Rockers with same push rods.I replaced the lifters with new set (Comp Cams) that I originally bought for my 440 .Same part number CC822-16 and lubed cam lobes and lifters. Motor sounds nice at idle ,no ticks or skips.Premium fuel. Almost like not getting gas at wot no power like timing chain off a tooth. I rotated the motor numerous times to double check marks when I assembled the Timing gears. Car is not yet registered. I only drove it a few miles each way for a front end alignment with a borrowed repair plate. I may register it so can drive it more but Winter and salt on roads makes me want to wait till spring.