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If you are in London, UK, & car is RHD, mechanic could be correct. I doubt though that the engine needs to removed. Engine mounts removed etc, & engine raised enough for access.
RemCharger is correct. Spring rate does not change. If you lower the car, your suspension is going to bottom out on the bump stops more often. You can reduce this, but not eliminate it, by using thicker t/bars. Another thing to consider: the length of the LCA is longer than the length of the UCA...
I have had ARP bolts that are the other way: too long [ & too short ]. You have to double check ARP stuff, their QC is terrible..if it exists at all.
Nothing wrong with the factory bolts.
[1] Resto cables are probably thin cables. Get some thicker cables or connect two sets of cables in parallel. That will reduce voltage drop & might just get you over the 'hump'.
[2] Locked timing. Use a switch to cut the ign. Get the engine cranking with ign off, & switch ign on while cranking...
Is it a MP cam? Looks like it. 280* adv, 0.480" valve lift, 0.316" lobe lift. That is a very mild cam, even on a 842 Chev lifter. Crane's most aggressive 842 lobes have 0.328" lobe lift for 238 @ 050. Your cam has only 316 lift & is used with the bigger 904 lifter.
Bottom line: no problem using...
Are you talking about the slight indentation on the lifter edge adjacent to your thumb nail? It looks like a small chip. If the cam you are using is designed for the 0.842" Chebby lifter no problem. What are the cam specs?
If the cam is designed for the Chrys 0.904" lifter, then you should...
RT,
Very annoying & feel your pain [ and the $$$$ ]. I doubt that dent will affect the operation of the coil, not that that makes it ok. What module are you using.
The rate of lift of a FT cam is limited by lifter diam because the edge of the lifter will 'dig in' to the lobe. Bigger diam lifter, more aggressive rate of lift & more lobe lift. That is why mushroom lifters were invented to get more lift & more area under the curve. Roller lifters do not have...
The contact point does NOT affect how the lifter accelerates. It is merely the contact point. The lifter does not know what is to come after the initial contact has been made.