I didn't know it at the time.
That using Cinder Blocks is a very poor choice to support a vehicle and they cannot be trusted
After doing a search on the topic, I learned a lot of valuable information about what makes them so unsafe.
Here are a couple of examples.
a) Failure to set them on a flat hard surface. Can cause uneven pressure points leading to failure.
b) A bolt head on the bottom of a frame member being lowered on to a cinder block, causing an uneven pressure point leading to failure.
c) Not setting them in the correct orientation, laying them on there side. Holes must be vertical as they would be set on a block wall.
d) Unseen internal casting flaws.
f) Rough handling before they were purchased, causing cracks.
g) Bad material batch when casted.
h) They fail with no warning into a pile of rubble.
Like I said, I didn't know any of this at the time when I purchased 4 Cinder Blocks, to provide a flat level surface to perform a rough alignment on my Fiero.
Not to mention at a cost of $1.08 a piece what a deal!
So I got everything set up. Fabricated some leveling jack screws, attached them to the cinder blocks and leveled everything up.
Jounced the suspension a few times, made a rear camber adjustment and called it a night and posted some pictures.
Lucky for me!..... It wasn't long after I posted, I received a PM from a concerned forum member who shared his observations about my......... "set up."
I had placed the cinder block on it weakest side and converted it into a truss with the jack screws
With no support in the center, the majority of the stress was on the thin horizontal sections of the block.
The cracks beginning to form on the Cinder Block.
It could have collapsed at any time with out warning!
So back to home center for a 4x6x8 and a 1x8x8.
I'm eating crow, but if it prevents someone from getting injured it's worth it!