Yes. The camshaft determines valve lift, duration and timing. By changing those specifications the engine performance can be significantly modified.
SOMETIMES poor maintenance can contribute to sticking lifters. If you suspect that as the cause, try flushing the crankcase with a good additive for removing sludge. It probably won't help, but it's worth a try, just in case that's all that's wrong. If THAT doesn't help, you'll need new lifters and I wouldn't bother putting new lifters in without replacing the camshaft. Hydraulic lifters are self adjusting, so you won't get any benefit from attempting to adjust your valves.
6'5''
no, u need to remove the heads to get at the lifters
no.
No. They intake and heads need removed.
They sell products called "label lifters" that do the job.
does add color to water tell about changing matter without changing its shape
No. It is possible to change direction without changing speed. However, it is not possible to change direction without changing velocity.
No
If you are refering to the 4.0 liter s.o.h.c.,which I think you are. It does not have (tappets) lifters. Its a single overhead cam engine.(no pushrods or lifters)The values are opened directly by the cam.
A physical property can be observed without changing the substance into something else.
either replace them or add motor honey to go for a longer perion without noise....