Pacifica,thanks for posting that pic,big help! if its convienient can you measure base to pushrod cup dimension? I measured a bunch of lifters yesterday and found it easier/more accurate with a 3/8 ball bearing sitting in the cup.The lifters all had different dimensions with the comp 824 being significantly shorter,causing my problems.If I use the comp 822 lifters I am good to go because they are taller but they are listed for 68 up wedge motors.

Can anyone tell me how I can id whether or not my comp 278 has the low taper lobes or not?

How can you tell if lifters are low taper or not?